About this documentation
Chapter 1. Meet your computer
Chapter 2. Get started with your computer
Chapter 3. Explore your computer
Chapter 4. Secure your computer and information
Chapter 5. UEFI BIOS
Chapter 6. Troubleshooting, diagnostics, and recovery
Chapter 7. CRU replacement
- What are CRUs
- Replace a CRU
Chapter 8. Help and support
Appendix A. Important safety information
Appendix B. Accessibility and ergonomic information
Appendix C. Compliance information
Appendix D. Notices and trademarks

Lenovo M75s SFF User Manual

Displayed below is the user manual for M75s SFF by Lenovo which is a product in the PCs/Workstations category. This manual has pages.

Related Manuals

Lenovo M75s Manual

Lenovo M75s Gen 2 Manual

M75s-1

User Guide

Read this first

Before using this documentation and the product it supports, ensure that you read and understand the

following:

• Appendix A “Important safety information” on page 77

• Safety and Warranty Guide

• Setup Guide

First Edition (October 2019)

LIMITED AND RESTRICTED RIGHTS NOTICE: If data or software is delivered pursuant to a General Services

Administration “GSA” contract, use, reproduction, or disclosure is subject to restrictions set forth in Contract No. GS-

35F-05925.

Contents

About this documentation . . . . . . . . iii

Chapter 1. Meet your computer . . . . . 1

Front . . . . . . . . . . . . . . . . . . . . 1

Rear . . . . . . . . . . . . . . . . . . . . 3

System board . . . . . . . . . . . . . . . . 5

Features and specifications . . . . . . . . . . . 7

Statement on USB transfer rate . . . . . . . . 8

Chapter 2. Get started with your

computer . . . . . . . . . . . . . . . . . 9

Get started with Windows 10 . . . . . . . . . . 9

Windows account . . . . . . . . . . . . . 9

Windows user interface . . . . . . . . . . 10

Connect to networks . . . . . . . . . . . . . 11

Connect to the wired Ethernet . . . . . . . 11

Connect to Wi-Fi networks (for selected

models) . . . . . . . . . . . . . . . . 11

Use Lenovo Vantage . . . . . . . . . . . . . 11

Use multimedia . . . . . . . . . . . . . . . 12

Use audio . . . . . . . . . . . . . . . 12

Chapter 3. Explore your computer . . 13

Manage power . . . . . . . . . . . . . . . 13

Set power button behaviors . . . . . . . . 13

Set the power plan . . . . . . . . . . . . 13

Transfer data . . . . . . . . . . . . . . . . 13

Connect to a Bluetooth-enabled device (for

selected models) . . . . . . . . . . . . 13

Use the optical drive (for selected models) . . 14

Use a media card (for selected models). . . . 14

Use a smart cable clip . . . . . . . . . . . . 14

Purchase accessories . . . . . . . . . . . . 15

Chapter 4. Secure your computer

and information . . . . . . . . . . . . 17

Lock the computer . . . . . . . . . . . . . 17

Use passwords . . . . . . . . . . . . . 18

Use the fingerprint reader . . . . . . . . . 19

Use software security solutions. . . . . . . . . 19

Use firewalls . . . . . . . . . . . . . . 19

Use antivirus programs . . . . . . . . . . 20

Use Computrace Agent software embedded

in firmware (for selected models) . . . . . . 20

Use BIOS security solutions . . . . . . . . . . 20

Erase all storage drive data . . . . . . . . 20

Use the cover presence switch . . . . . . . 20

Use Smart USB Protection. . . . . . . . . 21

Chapter 5. UEFI BIOS . . . . . . . . . 23

What is UEFI BIOS. . . . . . . . . . . . . . 23

Enter the BIOS menu. . . . . . . . . . . . . 23

Navigate in the BIOS interface . . . . . . . . . 23

Set the system date and time . . . . . . . . . 23

Change the startup sequence . . . . . . . . . 24

Enable or disable the configuration change

detection feature . . . . . . . . . . . . . . 24

Enable or disable the automatic power-on

feature . . . . . . . . . . . . . . . . . . 25

Enable or disable the smart power-on feature . . . 25

Enable or disable the ErP LPS compliance mode . . 25

Enable or disable the ICE thermal alert feature . . . 26

Change the ICE performance mode . . . . . . . 26

Change the fan speed level . . . . . . . . . . 26

Change BIOS settings before installing a new

operating system . . . . . . . . . . . . . . 27

Update UEFI BIOS. . . . . . . . . . . . . . 27

Recover from a BIOS update failure . . . . . . . 27

Clear CMOS . . . . . . . . . . . . . . . . 28

Chapter 6. Troubleshooting,

diagnostics, and recovery . . . . . . . 29

Basic procedure for resolving computer

problems . . . . . . . . . . . . . . . . . 29

Troubleshooting . . . . . . . . . . . . . . 29

Startup problems . . . . . . . . . . . . 30

Audio problems . . . . . . . . . . . . . 31

Network problems . . . . . . . . . . . . 32

Performance problems . . . . . . . . . . 34

Storage drive problems . . . . . . . . . . 35

CD or DVD problems . . . . . . . . . . . 35

Serial connector problems . . . . . . . . . 36

USB device problems . . . . . . . . . . 36

Software problems. . . . . . . . . . . . 37

Diagnostics . . . . . . . . . . . . . . . . 37

Lenovo diagnostic tools . . . . . . . . . . 37

Recovery . . . . . . . . . . . . . . . . . 37

Restore system files and settings to an earlier

point . . . . . . . . . . . . . . . . . 37

Restore your files from a backup . . . . . . 37

Reset your computer . . . . . . . . . . . 37

Use advanced options . . . . . . . . . . 38

Windows automatic recovery. . . . . . . . 38

Create and use a recovery USB device . . . . 38

Update the device driver . . . . . . . . . 39

Chapter 7. CRU replacement . . . . . 41

What are CRUs . . . . . . . . . . . . . . . 41

Replace a CRU . . . . . . . . . . . . . . . 42

Vertical stand . . . . . . . . . . . . . . 42

Dust shield . . . . . . . . . . . . . . . 44

Computer cover . . . . . . . . . . . . . 46

Front bezel . . . . . . . . . . . . . . . 47

Optical drive . . . . . . . . . . . . . . 49

Pivot the drive bay assembly upward and

downward . . . . . . . . . . . . . . . 50

Primary storage drive (a 2.5-inch or 3.5-inch

storage drive) . . . . . . . . . . . . . . 52

2.5-inch secondary storage drive . . . . . . 56

M.2 solid-state drive . . . . . . . . . . . 59

Coin-cell battery. . . . . . . . . . . . . 63

Memory module . . . . . . . . . . . . . 64

PCI Express card . . . . . . . . . . . . 66

Wi-Fi card . . . . . . . . . . . . . . . 68

Power supply assembly . . . . . . . . . . 69

Chapter 8. Help and support . . . . . 73

Self-help resources . . . . . . . . . . . . . 73

Call Lenovo . . . . . . . . . . . . . . . . 74

Before you contact Lenovo . . . . . . . . 74

Lenovo Customer Support Center . . . . . . 74

Purchase additional services. . . . . . . . . . 75

Appendix A. Important safety

information . . . . . . . . . . . . . . . 77

Appendix B. Accessibility and

ergonomic information . . . . . . . . 91

Appendix C. Compliance

information . . . . . . . . . . . . . . . 95

Appendix D. Notices and

trademarks . . . . . . . . . . . . . . . 107

ii M75s-1 User Guide

About this documentation

• Illustrations in this documentation might look different from your product.

• Depending on the model, some optional accessories, features, and software programs might not be

available on your computer.

• Depending on the version of operating systems and programs, some user interface instructions might not

be applicable to your computer.

• Documentation content is subject to change without notice. Lenovo makes constant improvements on the

documentation of your computer, including this User Guide. To get the latest documentation, go to:

https://support.lenovo.com

• Microsoft® makes periodic feature changes to the Windows® operating system through Windows Update.

As a result, some information in this documentation might become outdated. Refer to Microsoft resources

for the latest information.

iv M75s-1 User Guide

Chapter 1. Meet your computer

Front

1. Optical drive eject button* Eject the optical drive tray.

2. Optical drive activity indicator* This indicator is on when the optical drive is in use.

3. Power button

Press to turn on the computer.

To turn off the computer, open the Start menu, click Power, and then select

Shut down.

The indicator in the power button shows the system status of your computer.

• On: The computer is on.

• Off: The computer is off or in hibernation mode.

• Blinking slowly: The computer is in sleep mode.

4. Storage drive activity indicator This indicator is on when the storage drive is in use.

5. SD-card reader slot*

Supported cards:

• Secure Digital (SD) card

• Secure Digital eXtended-Capacity (SDXC) USH-1 card

• Secure Digital High-Capacity (SDHC) USH-1 card

Note: Your computer does not support the content protection for recordable

media (CPRM) feature for the SD card.

See “Use a media card (for selected models)” on page 14.

6. Microphone connector Connect a microphone.

7. Headphone connector Connect headphones to your computer.

8. USB 3.1 Gen 2 connectors (2) Connect USB-compatible devices, such as a USB keyboard, USB mouse, USB

storage device, or USB printer.

9. USB 3.1 Gen 1 connectors (2) Connect USB-compatible devices, such as a USB keyboard, USB mouse, USB

storage device, or USB printer.

10. ThinkCentre® LED This indicator is on when the computer is on.

11. Internal speaker* Enable you to experience quality sound.

* for selected models

2M75s-1 User Guide

Rear

1. Audio line-in connector

Receive audio signals from an external audio device, such as a stereo system. To

connect an external audio device, connect a cable between the audio line-out

connector of the device and the audio line-in connector of the computer.

2. Audio line-out connector

Send audio signals from the computer to external devices, such as powered

stereo speakers, headphones, or multimedia keyboards. To connect a stereo

system or other external recording device, connect a cable between the audio

line-in connector of the device and the audio line-out connector of the computer.

Note: If your computer has both an audio line-out connector and a headset or

headphone connector, always use the headset or headphone connector for

earphones, headphones, or a headset. The headphone connector does not

support headset microphones.

3. Microphone connector Connect a microphone to your computer when you want to record sound or

interact with the computer using speech recognition software.

4. Serial connector Connect an external modem, a serial printer, or other devices that use a serial

connector.

5. VGA-out connector Send video signals from the computer to another video device, such as a monitor.

6. DisplayPort® 1.2 out

connectors (2)

Send audio and video signals from the computer to another audio or video device,

such as a high-performance monitor. For more information, see https://

www.vesa.org/wp-content/uploads/2010/12/DisplayPort-DevCon-Presentation-DP-

1.2-Dec-2010-rev-2b.pdf.

Chapter 1.Meet your computer 3

7. USB 3.1 connector Gen 1

Connect USB-compatible devices, such as a USB keyboard, USB mouse, USB

storage device, or USB printer.

Note: The USB 3.1 connector Gen 1 supports the smart power on feature. If you

connect a Lenovo-recommended USB 1.1 keyboard to this connector, you can

power on the computer or wake it up from S4 hibernation mode by pressing Alt+P

on the keyboard. Ensure that you use a Lenovo-recommended keyboard that

supports the smart power on feature.

8. USB 3.1 connector Gen 1 Connect USB-compatible devices, such as a USB keyboard, USB mouse, USB

storage device, or USB printer.

9. USB 2.0 connectors (2) Connect USB-compatible devices, such as a USB keyboard, USB mouse, USB

storage device, or USB printer.

10. PS/2 keyboard connector Connect a keyboard that uses a Personal System/2 (PS/2) keyboard connector.

11. PS/2 mouse connector Connect a mouse, a trackball, or other pointing devices that use a PS/2 mouse

connector.

12. PCI-Express card area

Install PCI-Express cards into this area to improve the operating performance of

the computer. Depending on the computer model, the connectors in this area

vary.

13. Smart cable clip slots (2)* Lock devices (such as the keyboard and the mouse) to your computer through a

smart cable clip.

14. Security-lock slot Lock your computer to a desk, table, or other fixtures through a Kensington-style

cable lock.

15. Padlock loop Lock the computer cover through a padlock.

16. Ethernet connector

Connect to a local area network (LAN). When the green indicator is on, the

computer is connected to a LAN. When the yellow indicator blinks, data is being

transmitted.

17. Power cord connector Connect the power cord to your computer for power supply.

* for selected models

4M75s-1 User Guide

System board

1 4-pin power connector 2 Microprocessor socket

3 Microprocessor fan connector 4 Memory slot (DIMM1)

5 Memory slot (DIMM2) 6 Memory slot (DIMM3)

7 Memory slot (DIMM4) 8 Auxiliary fan connector 2

9 Power button board connector 10 Storage drive activity indicator

11 SATA power connectors (2) 12 10-pin power connector

13 Coin-cell battery 14 FCH

15 SATA 3.0 connectors (3) 16 Clear CMOS (Complementary Metal Oxide

Semiconductor)/Recovery jumper

17 Auxiliary fan connector 1 18 ThinkCentre LED connector

19 Thermal sensor connector 20 M.2 solid-state drive slot

21 Cover presence switch connector (intrusion switch

connector)

22 Front USB 2.0 connector (card reader connector)

23 Front USB 2.0 connector 24 Parallel connector

25 Serial (COM2) connector 26 PCI card slot

27 Buzzer 28 PCI Express x1 card slots (2)

Chapter 1.Meet your computer 5

29 M.2 Wi-Fi card slot 30 PCI Express x16 graphics card slot

31 System fan connector

6M75s-1 User Guide

Features and specifications

Dimensions

• Width: 92.5 mm (3.6 inches)

• Height: 343.5 mm (13.5 inches)

• Depth: 290.5 mm (11.4 inches)

Weight (without the package) Maximum configuration as shipped: 6.0 kg (13.2 lb)

Hardware configuration

1. Right-click the Start button to open the Start context menu.

2. Click Device Manager. Type the administrator password or provide

confirmation if prompted.

Power supply • 180-watt automatic voltage-sensing power supply

• 210-watt automatic voltage-sensing power supply

Electrical input • Input voltage: From 100 V ac to 240 V ac

• Input frequency: 50/60 Hz

Adaptability for power supply

• Mainland China: 220 V±22 V, 50 Hz±1 Hz

• Adaptive voltage positioning: 90 V to 264 V, 50/60 Hz

• With voltage selection switch: 90 V to 264 V, 50 Hz±1 Hz

Microprocessor To view the microprocessor information of your computer, right-click the Start

button and then click System.

Memory Up to four double data rate 4 (DDR4) unbuffered dual inline memory modules

(UDIMMs)

Storage device

• 2.5-inch form factor, 7-mm (0.28-inch) height hard disk drive*

• 3.5-inch form factor, 7-mm (0.28-inch) height hard disk drive*

• M.2 solid-state drive*

To know the storage drive capacity:

1. Right-click the Start button to open the Start context menu.

2. Click Disk Management.

Note: The storage drive capacity indicated by the system is less than the nominal

capacity.

Audio features

• The integrated audio card supports the following:

– Audio line-in connector

– Audio line-out connector

– Headphone connector

– Internal speaker*

– Microphone connector

Chapter 1.Meet your computer 7

Expansion

• Card reader*

• Memory slots

• Optical drive

• PCI Express x1 card slot

• PCI Express x16 graphics card slot

• Storage drive bay

Network features

• Bluetooth*

• Ethernet LAN

• Wireless LAN*

* for selected models

Statement on USB transfer rate

Depending on many factors such as the processing capability of the host and peripheral devices, file

attributes, and other factors related to system configuration and operating environments, the actual transfer

rate using the various USB connectors on this device will vary and will be slower than the data rate listed

below for each corresponding device.

USB device Data rate (Gbit/s)

3.1 Gen 1 5

3.1 Gen 2 10

3.2 20

8M75s-1 User Guide

Chapter 2. Get started with your computer

Get started with Windows 10

Learn the basics of Windows 10 and start working with it right away. For more information about Windows

10, see the Windows help information.

Windows account

A user account is required to use the Windows operating system. It can either be a Windows user account or

a Microsoft account.

Windows user account

When you start Windows for the first time, you are prompted to create a Windows user account. This first

account you created is of the “Administrator” type. With an Administrator account, you can create additional

user accounts or change account types by doing the following:

1. Open the Start menu and select Settings ➙ Accounts ➙ Family & other users.

2. Follow the on-screen instructions.

Microsoft account

You can also log in to the Windows operating system with a Microsoft account.

To create a Microsoft account, go to the Microsoft sign-up page at https://signup.live.com and follow the on-

screen instructions.

With a Microsoft account, you can:

• Enjoy one-time signing in if you are using other Microsoft services, such as OneDrive, Skype, and Outlook.

com.

• Sync personalized settings across other Windows-based devices.

Windows user interface

1. Account Change account settings, lock the computer, or sign out from the current account.

2. Documents Open the Documents folder, a default folder to save your received files.

3. Pictures Open the Pictures folder, a default folder to save your received pictures.

4. Settings Launch Settings.

5. Power Shut down, restart, or put the computer into sleep mode.

6. Start button Open the Start menu.

7. Windows Search Type what you are looking for in the search box and get search results from your

computer and the Web.

8. Task View Display all opened apps and switch among them.

9. Windows notification area Display notifications and status of some features.

10. Battery status icon Display power status and change battery or power settings. When your computer

is not connected to ac power, the icon changes to .

11. Network icon Connect to an available wireless network and display the network status. When

connected to a wired network, the icon changes to .

12. Action center Display the latest notifications from apps and provide quick access to some

features.

Open the Start menu

• Click the Start button.

• Press the Windows logo key on the keyboard.

Open the Start context menu

Right-click the Start button.

10 M75s-1 User Guide

Access Control Panel

• Open the Start menu and click Windows System ➙ Control Panel.

• Use Windows Search.

Launch an app

• Open the Start menu and select the app you want to launch.

• Use Windows Search.

Connect to networks

Your computer helps you connect to the world through a wired or wireless network.

Connect to the wired Ethernet

Connect your computer to a local network through the Ethernet connector on your computer with an

Ethernet cable.

Connect to Wi-Fi networks (for selected models)

1. Click the network icon in the Windows notification area. A list of available wireless networks is displayed.

2. Select a network available for connection. Provide required information, if needed.

Use Lenovo Vantage

The preinstalled Lenovo Vantage is a customized one-stop solution to help you maintain your computer with

automated updates and fixes, configure hardware settings, and get personalized support.

Access Lenovo Vantage

Open the Start menu and click Lenovo Vantage. You also can type Lenovo Vantage in the search box.

To download the latest version of Lenovo Vantage, go to Microsoft Store and search by the app name.

Key features

Lenovo Vantage enables you to:

• Know the device status easily and customize device settings.

• Download and install UEFI BIOS, firmware and driver updates to keep your computer up-to-date.

• Monitor your computer health, and secure your computer against outside threats.

• Look up warranty status (online).

• Access User Guide and helpful articles.

Notes:

• The available features vary depending on the computer model.

• Lenovo Vantage makes periodic updates of the features to keep improving your experience with your

computer. The description of features might be different from that on your actual user interface.

Chapter 2.Get started with your computer 11

Use multimedia

Use your computer for business or entertainment with the devices (such as a camera, a monitor, or

speakers).

Use audio

To enhance the audio experience, connect speakers, headphones, or a headset to the audio connector.

Adjust the volume

1. Click the volume icon in the Windows notification area on the taskbar.

2. Follow the on-screen instructions to adjust the volume. Click the speaker icon to mute the audio.

Change the sound settings

1. Go to Control Panel and view by category.

2. Click Hardware and Sound ➙ Sound.

3. Change the settings as you prefer.

12 M75s-1 User Guide

Chapter 3. Explore your computer

Manage power

Use the information in this section to achieve the best balance between performance and power efficiency.

Set power button behaviors

You can define what the power button does according to your preference. For example, by pressing the

power button, you can turn off the computer or put the computer to sleep or hibernation mode.

To change what the power button does:

1. Go to Control Panel and view by large icons or small icons.

2. Click Power Options ➙ Choose what the power buttons do.

3. Change the settings as you prefer.

Set the power plan

For ENERGY STAR® compliant computers, the following power plan takes effect when your computers have

been idle for a specified duration:

Table 1. Default power plan (when plugged into ac power)

• Turn off the display: After 10 minutes

• Put the computer to sleep: After 25 minutes

To awaken the computer from Sleep mode, press any key on your keyboard.

To reset the power plan to achieve the best balance between performance and power saving:

1. Go to Control Panel and view by large icons or small icons.

2. Click Power Options, and then choose or customize a power plan of your preference.

Transfer data

Quickly share your files using the built-in Bluetooth technology among devices with the same features. You

also can install a disc or media card to transfer data.

Connect to a Bluetooth-enabled device (for selected models)

You can connect all types of Bluetooth-enabled devices to your computer, such as a keyboard, a mouse, a

smartphone, or speakers. To ensure that the connection is successful, place the devices 10 meters (33 feet),

at most, from the computer.

1. Turn on Bluetooth on the computer.

a. Open the Start menu, and then click Settings ➙ Devices ➙ Bluetooth & other devices.

b. Turn on the Bluetooth switch.

2. Click Add Bluetooth or other device ➙ Bluetooth.

3. Select a Bluetooth device, and then follow the on-screen instructions.

Your Bluetooth device and computer will automatically connect the next time if the two devices are in range

of each other with Bluetooth turned on. You can use Bluetooth for data transfer or remote control and

communication.

Use the optical drive (for selected models)

If your computer has an optical drive, read the following information.

Know the type of your optical drive

1. Right-click the Start button to open the Start context menu.

2. Click Device Manager. Type the administrator password or provide confirmation if prompted.

Install or remove a disc

1. With the computer on, press the eject button on the optical drive. The tray slides out of the drive.

2. Insert a disc into the tray or remove a disc from the tray, and then push the tray in to close the tray.

Note: If the tray does not slide out of the drive when you press the eject button, turn off the computer. Then,

insert a straightened paper clip into the emergency-eject hole adjacent to the eject button. Use the

emergency eject only in an emergency.

Record a disc

1. Insert a recordable disc into the optical drive that supports recording.

2. Do one of the following:

• Open the Start menu, and then click Settings ➙ Devices ➙ AutoPlay. Select or turn on Use

AutoPlay for all media and devices.

• Open Windows Media Player.

• Double-click the ISO file.

3. Follow the on-screen instructions.

Use a media card (for selected models)

If your computer has a SD-card slot, read the following information.

Install a media card

1. Locate the SD-card slot.

2. Ensure that the metal contacts on the card are facing the ones in the SD-card slot. Insert the card firmly

into the SD-card slot until it is secured in place.

Remove a media card

Attention: Before removing a media card, eject the card from the Windows operating system first.

Otherwise, data on the card might get corrupted or lost.

1. Click the triangular icon in the Windows notification area to show hidden icons. Then, right-click the

Safely Remove Hardware and Eject Media icon.

2. Select the corresponding item to eject the card from the Windows operating system.

3. Press the card and remove it from your computer. Store the card safely for future use.

Use a smart cable clip

Note: You can purchase a smart cable clip from Lenovo.

14 M75s-1 User Guide

Lock devices (such as the keyboard and the mouse) to your computer through a smart cable clip.

1. Insert the clip 1 into the cable-lock slot 4.

2. Pull the cables you want to lock through the dents in the smart cable clip.

3. Press the clip 2 into the cable-lock slot 3 until it snaps into position.

Purchase accessories

Lenovo has a number of hardware accessories and upgrades to help expand the capabilities of your

computer. Options include memory modules, storage devices, network cards, power adapters, keyboards,

mice, and more.

To shop at Lenovo, go to https://www.lenovo.com/accessories.

Chapter 3.Explore your computer 15

16 M75s-1 User Guide

Chapter 4. Secure your computer and information

Lock the computer

Note: You are responsible for evaluating, selecting, and implementing the locking device and security

feature. Lenovo makes no comments, judgments, or warranties about the function, quality, or performance

of the locking device and security feature. You can purchase computer locks from Lenovo.

Padlock

Locking the computer cover through a padlock prevents unauthorized access to the inside of your computer.

Kensington-style cable lock

Lock your computer to a desk, table, or other fixtures through a Kensington-style cable lock.

This section provides secure ways to log in to your computer with a password, a fingerprint, or your face.

Use passwords

Password types

You can set the following passwords in UEFI (Unified Extensible Firmware Interface) BIOS (Basic Input/

Output System) to prevent unauthorized access to your computer. However, you are not prompted to enter

any UEFI BIOS password when your computer resumes from sleep mode.

• Power-on password

When a power-on password is set, you are prompted to enter a valid password each time the computer is

turned on. The computer cannot be used until the valid password is entered.

• Supervisor password

Setting a supervisor password deters unauthorized users from changing configuration settings. If you are

responsible for maintaining the configuration settings of several computers, you might want to set a

supervisor password.

When a supervisor password is set, you are prompted to enter a valid password each time you try to enter

the BIOS menu.

If both the power-on password and supervisor password are set, you can enter either password.

However, you must use your supervisor password to change any configuration settings.

• Hard disk password

Setting a hard disk password prevents unauthorized access to the data on the storage drive. When a hard

disk password is set, you are prompted to enter a valid password each time you try to access the storage

drive.

Note: After you set a hard disk password, your data on the storage drive is protected even if the storage

drive is removed from one computer and installed in another.

• System management password (for selected models)

You can enable the system management password to have the same authority as the supervisor

password to control security related features. To customize the authority of the system management

password through the UEFI BIOS menu:

1. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.

2. Select Security ➙ System Management Password Access Control.

3. Follow the on-screen instructions.

If you have set both the supervisor password and the system management password, the supervisor

password overrides the system management password.

Set, change, and remove a password

Before you start, print these instructions.

1. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.

2. Select Security.

3. Depending on the password type, select Set Supervisor Password, Set Power-On Password, Set

System Management Password, or Hard Disk Password and press Enter.

4. Follow the on-screen instructions to set, change, or remove a password.

5. Press F10 or Fn+F10 to save the changes and exit.

You should record your passwords and store them in a safe place. If you forget the passwords, see “Clear

CMOS” on page 28 to remove them by yourself. You can also contact a Lenovo-authorized service provider

to have the passwords removed.

18 M75s-1 User Guide

Notes:

• If the supervisor password is forgotten, it might not be removed by clearing CMOS depending on your

BIOS settings.

• If the hard disk password is forgotten, Lenovo cannot remove the password or recover data from the

storage drive.

Use the fingerprint reader

If you use a mouse with a fingerprint reader on it, fingerprint authentication can replace your passwords and

enables you to log in to your computer simply and securely.

Enroll your fingerprints

Open the Start menu and then click Settings ➙ Accounts ➙ Sign-in options. Then, follow the on-screen

instructions to finish the enrollment.

During the enrollment, the fingerprints are associated with the Windows password automatically. It is

recommended that you enroll more than one fingerprint in case of any injuries to your fingers.

If the fingerprint reader indicator blinks in amber, the authentication is not successful.

Maintain the fingerprint reader

To ensure that the fingerprint reader works correctly, do not:

• Scratch the surface of the reader with anything hard.

• Use or touch the reader with a wet, dirty, wrinkled, or injured finger.

Use software security solutions

This section provides software solutions to secure your computer and information.

Use firewalls

A firewall can be hardware, software, or a combination of both depending on the level of security required.

Firewalls work on a set of rules to determine which inbound and outbound connections are authorized. If the

computer is preinstalled with a firewall program, it helps protect against computer Internet security threats,

unauthorized access, intrusions, and Internet attacks. It also protects your privacy. For more information

about how to use the firewall program, refer to the help system of your firewall program.

To use firewalls:

1. Go to Control Panel and view by large icons or small icons.

2. Click Windows Defender Firewall, and then follow the on-screen instructions.

Chapter 4.Secure your computer and information 19

Use antivirus programs

The computer is preinstalled with an antivirus program to help you guard against, detect, and eliminate

viruses.

Lenovo provides a full version of antivirus software on the computer with a free 30-day subscription. After 30

days, you must renew the license to continue receiving the antivirus software updates.

Note: Virus definition files must be kept up-to-date to guard against new viruses.

For more information about how to use your antivirus software, refer to the help system of your antivirus

software.

Use Computrace Agent software embedded in firmware (for selected

models)

The Computrace Agent software is an IT asset management and computer theft recovery solution. The

software detects if changes have been made on the computer, such as hardware, software, or the computer

call-in location. You might have to purchase a subscription to activate the Computrace Agent software.

Use BIOS security solutions

This section provides BIOS solutions to secure your computer and information.

Erase all storage drive data

It is recommended that you erase all storage drive data before recycling a storage drive or the computer.

To erase all storage drive data:

1. Set a hard disk password for the storage drive you will recycle. See “Use passwords” on page 18.

2. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.

3. Select Security ➙ Hard Disk Password ➙ Security Erase HDD Data and press Enter.

4. Select the storage drive you will recycle and press Enter.

5. A message is displayed, prompting you to confirm the operation. Select Yes and press Enter. The

erasing process begins.

Note: During the erasing process, the power button and the keyboard are disabled.

6. After the erasing process is completed, a message is displayed, prompting you to reset the system.

Select Continue.

Note: Depending on the storage drive capacity, the erasing process will take half an hour to three hours.

7. After the resetting process is completed, one of the following will happen:

• If the data on the system storage drive is erased, you will be prompted that no operating system is

available.

• If the data on the non-system storage drive is erased, the computer restarts automatically.

Use the cover presence switch

The cover presence switch prevents the computer from logging in to the operating system when the

computer cover is not properly installed or closed.

To enable the cover presence switch connector on the system board:

1. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.

20 M75s-1 User Guide

2. Select Security ➙ Cover Tamper Detected and press Enter.

3. Select Enabled and press Enter.

4. Press F10 or Fn+F10 to save the changes and exit.

When the cover presence switch connector on the system board is enabled, if the cover presence switch

detects that the computer cover is not correctly installed or closed, an error message will be displayed when

you turn on the computer. To bypass the error message and log in to the operating system:

1. Properly install or close the computer cover.

2. Enter the BIOS menu, save and then exit.

Use Smart USB Protection

The Smart USB Protection function is a security function that helps prevent data from being copied from the

computer to USB storage devices connected to the computer. You can set the Smart USB Protection

function to one of the following modes:

• Disabled (default setting): You can use the USB storage devices without limitation.

• Read Only: You cannot copy data from the computer to the USB storage devices. However, you can

access or modify data on the USB storage devices.

• No Access: You cannot access the USB storage devices from the computer.

To configure the Smart USB Protection function:

1. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.

2. Select Security ➙ Smart USB Protection and press Enter.

3. Select the desired setting and press Enter.

4. Press F10 or Fn+F10 to save the changes and exit.

Chapter 4.Secure your computer and information 21

22 M75s-1 User Guide

Chapter 5. UEFI BIOS

This chapter provides information about configuring and updating UEFI BIOS, and clearing CMOS.

What is UEFI BIOS

Note: The operating system settings might override any similar settings in UEFI BIOS.

UEFI BIOS is the first program that the computer runs when the computer is turned on. UEFI BIOS initializes

the hardware components and loads the operating system and other programs. Your computer comes with a

setup program with which you can change UEFI BIOS settings.

Enter the BIOS menu

Restart the computer. When the logo screen is displayed, press F1 or Fn+F1 to enter the BIOS menu.

Note: If you have set BIOS passwords, enter the correct passwords when prompted. You also can press

Enter to skip the password prompt and enter the BIOS menu. However, you cannot change the system

configurations that are protected by passwords.

Navigate in the BIOS interface

Attention: The default configurations are already optimized for you in boldface. Improper change of the

configurations might cause unexpected results.

Depending on your keyboard, you can navigate in the BIOS interface by pressing the following keys, or

combinations of Fn and the following keys:

F1 or Fn+F1 Display the General Help screen.

Esc or Fn+Esc Exit the submenu and return to the parent menu.

↑↓ or Fn+↑↓ Locate an item.

← → or Fn+← → Select a tab.

+/– or Fn++/– Change to a higher or lower value.

Enter Enter the selected tab or submenu.

F9 or Fn+F9 Restore to the default settings.

F10 or Fn+F10 Save your configuration and exit.

Set the system date and time

1. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.

2. Select Main ➙ System Time & Date and press Enter.

3. Set the system date and time as desired.

4. Press F10 or Fn+F10 to save the changes and exit.

Change the startup sequence

If the computer does not start up from a device as expected, you can change the startup device sequence

permanently or select a temporary startup device.

Change the startup device sequence permanently

1. Depending on the type of the storage device, do one of the following:

• If the storage device is internal, go to step 2.

• If the storage device is a disc, ensure that the computer is on or turn on the computer. Then, insert

the disc into the optical drive.

• If the storage device is an external device other than a disc, connect the storage device to the

computer.

2. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.

3. Select Startup, and then follow the on-screen instructions to change the startup sequence.

4. Press F10 or Fn+F10 to save the changes and exit.

Select a temporary startup device

Note: Not all discs and storage drives are bootable.

1. Depending on the type of the storage device, do one of the following:

• If the storage device is internal, go to step 2.

• If the storage device is a disc, ensure that the computer is on or turn on the computer. Then, insert

the disc into the optical drive.

• If the storage device is an external device other than a disc, connect the storage device to the

computer.

2. Restart the computer. When the logo screen is displayed, press F12 or Fn+F12.

3. Select the storage device as desired and press Enter.

If you want to change the startup device sequence permanently, select Enter Setup on Startup Device Menu

and press Enter to enter the BIOS menu.

Enable or disable the configuration change detection feature

If you enable configuration change detection, when the POST detects configuration changes of some

hardware devices (such as storage drives or memory modules), an error message will be displayed when you

turn on the computer.

To enable or disable the configuration change detection feature:

1. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.

2. Select Security ➙ Configuration Change Detection and press Enter.

3. Enable or disable the feature as desired.

4. Press F10 or Fn+F10 to save the changes and exit.

To bypass the error message and log in to the operating system, press F2 or Fn+F2. To clear the error

message, enter the BIOS menu, save and then exit.

24 M75s-1 User Guide

Enable or disable the automatic power-on feature

The Automatic Power On item in UEFI BIOS provides various options for you to make your computer start up

automatically.

To enable or disable the automatic power-on feature:

1. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.

2. Select Power ➙ Automatic Power On and press Enter.

3. Select the feature as desired and press Enter.

4. Enable or disable the feature as desired.

5. Press F10 or Fn+F10 to save the changes and exit.

Enable or disable the smart power-on feature

Ensure that the keyboard is connected to a USB connector supporting the smart power-on feature. With the

smart power-on feature enabled, you can start up or wake up the computer from the hibernation mode by

pressing Alt+P.

To enable or disable the smart power-on feature:

1. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.

2. Select Power ➙ Smart Power On and press Enter.

3. Enable or disable the feature as desired.

4. Press F10 or Fn+F10 to save the changes and exit.

Enable or disable the ErP LPS compliance mode

Lenovo computers meet the eco-design requirements of the ErP Lot 3 regulation. For more information, go

to:

https://www.lenovo.com/ecodeclaration

You can enable the ErP LPS compliance mode to reduce the consumption of electricity when the computer

is off or in sleep mode.

To enable or disable the ErP LPS compliance mode:

1. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.

2. Select Power ➙ Enhanced Power Saving Mode and press Enter.

3. Depending on whether you select Enabled or Disabled, do one of the following:

• If you select Enabled, press Enter. Then, select Power ➙ Automatic Power On and press Enter.

Check whether the Wake on LAN feature is disabled automatically. If no, disable it.

• If you select Disabled, press Enter. Then, go to the next step.

4. Press F10 or Fn+F10 to save the changes and exit.

When the ErP LPS compliance mode is enabled, you can wake up the computer by doing one of the

following:

• Press the power button.

• Enable the Wake Up on Alarm feature to make the computer wake up at a set time.

To meet the off mode requirement of ErP compliance, you need to disable the Fast Startup function.

Chapter 5.UEFI BIOS 25

1. Go to Control Panel and view by large icons or small icons.

2. Click Power Options ➙ Choose what the power buttons do ➙ Change settings that are currently

unavailable.

3. Clear the Turn on fast startup (recommended) option from the Shutdown settings list.

4. Disable the smart power-on feature.

Enable or disable the ICE thermal alert feature

With the ICE thermal alert feature enabled, an alert log will be written into the Windows system log when a

critical thermal situation occurs. The alert log can help you identify thermal problems, such as malfunctioning

fans, abnormally high temperature, or poor cooling performances.

To enable or disable the ICE thermal alert feature:

1. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.

2. Select Power ➙ Intelligent Cooling Engine (ICE) and press Enter.

3. Select ICE Thermal Alert and press Enter.

4. Enable or disable the feature as desired.

5. Press F10 or Fn+F10 to save the changes and exit.

Change the ICE performance mode

You can adjust the acoustic and thermal performance of your computer by changing the ICE performance

mode. Three choices are available:

• Better Acoustic Performance (default setting): The computer works with less noise at a normal thermal

level.

• Better Thermal Performance: The computer works at a better thermal level with normal acoustic

performance.

• Full Speed: All fans in the computer will run at full speed.

To change the ICE performance mode:

1. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.

2. Select Power ➙ Intelligent Cooling Engine (ICE) and press Enter.

3. Select ICE Performance Mode and press Enter.

4. Set the ICE performance mode as desired.

5. Press F10 or Fn+F10 to save the changes and exit.

Change the fan speed level

You can change the fan speed level, from level 1 to level 7, to adjust the thermal performance of your

computer. A higher fan speed level indicates better thermal performance with more noise.

To change the fan speed level:

1. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.

2. Select Power ➙ Fan Control Stepping and press Enter.

3. Set the fan speed level as desired.

4. Press F10 or Fn+F10 to save the changes and exit.

26 M75s-1 User Guide

Change BIOS settings before installing a new operating system

BIOS settings vary by operating system. Change the BIOS settings before installing a new operating system.

Microsoft constantly makes updates to the Windows 10 operating system. Before installing a particular

Windows 10 version, check the compatibility list for the Windows version. For details, go to:

https://support.lenovo.com/us/en/solutions/windows-support

To change the BIOS settings:

1. Restart the computer. When the logo screen is displayed, press F1 or Fn+F1.

2. From the main interface, select Security ➙ Secure Boot and press Enter.

3. Depending on the operating system to be installed, do one of the following:

• To install the Windows 10 (64-bit) and most of Linux operating system, select Enabled for Secure

Boot.

• To install an operating system that does not support secure boot, select Disabled for Secure Boot.

4. Press F10 or Fn+F10 to save the changes and exit.

Update UEFI BIOS

When you install a new program, device driver, or hardware component, you might need to update UEFI

BIOS. You can update the BIOS from your operating system or a flash update disc (supported only on

selected models).

Download and install the latest UEFI BIOS update package by one of the following methods:

• From Lenovo Vantage:

Open Lenovo Vantage to check the available update packages. If the latest UEFI BIOS update package is

available, follow the on-screen instructions to download and install the package.

• From the Lenovo Support Web site:

1. Go to https://support.lenovo.com.

2. Download the flash BIOS update driver for the operating system version or the ISO image version

(used to create a flash update disc). Then, download the installation instructions for the flash BIOS

update driver you have downloaded.

3. Print the installation instructions and follow the instructions to update the BIOS.

Recover from a BIOS update failure

1. Remove all media from the drives and turn off all connected devices.

2. Insert the BIOS update disc into the optical drive, and then turn off the computer.

3. Disconnect all power cords from electrical outlets. Then, remove any parts that impede access to the

Clear CMOS /Recovery jumper.

4. Move the jumper from the standard position to the maintenance position.

5. Reconnect the power cords for the computer and the monitor to electrical outlets.

6. Turn on the computer and the monitor. When the computer beeps, the recovery process begins.

7. After the recovery process is completed, the computer will be turned off automatically.

Note: Depending on the computer model, the recovery process will take two to three minutes.

8. Disconnect all power cords from electrical outlets.

Chapter 5.UEFI BIOS 27

9. Move the jumper back to the standard position.

10. Reinstall all the parts that have been removed. Then, reconnect the power cords for the computer and

the monitor to electrical outlets.

11. Turn on the computer and the monitor. When the logo screen is displayed, press F1 or Fn+F1.

12. To prevent data loss, ensure that BIOS settings are restored to an earlier point before the BIOS update.

For BIOS configurations, see Chapter 5 “UEFI BIOS” on page 23.

Clear CMOS

1. Remove all media from the drives and turn off all connected devices and the computer.

2. Disconnect all power cords from electrical outlets. Then, remove any parts that impede access to the

Clear CMOS /Recovery jumper.

3. Move the jumper from the standard position to the maintenance position.

4. Reconnect the power cords for the computer and the monitor to electrical outlets.

5. Turn on the computer and the monitor. When the computer beeps, wait for approximately 10 seconds.

6. Turn off the computer by holding the power button for approximately four seconds.

7. Disconnect all power cords from electrical outlets.

8. Move the jumper back to the standard position.

9. Reinstall all the parts that have been removed. Then, reconnect the power cords for the computer and

the monitor to electrical outlets.

10. Turn on the computer and the monitor. When the logo screen is displayed, press F1 or Fn+F1.

11. To prevent data loss, ensure that BIOS settings are restored to an earlier point before the BIOS update.

For BIOS configurations, see Chapter 5 “UEFI BIOS” on page 23.

28 M75s-1 User Guide

Chapter 6. Troubleshooting, diagnostics, and recovery

This chapter provides solutions to resolve computer problems. Use the basic procedure as a starting point

for resolving computer problems.

Basic procedure for resolving computer problems

Prerequisite

Before you start, read Appendix A “Important safety information” on page 77 and print the following

instructions.

1. Check that:

a. The cables for all connected devices are connected correctly and securely.

b. All components have been reassembled correctly.

c. All connected devices that require ac power are connected to properly grounded and working

electrical outlets.

d. All connected devices are enabled in UEFI BIOS.

2. Use an antivirus program to see if the computer has been infected by a virus. If the program detects a

virus, remove the virus.

3. Go to “Troubleshooting” on page 29 and follow the instructions for the type of problem you are

experiencing.

4. Run the diagnostic program. See “Diagnostics” on page 37.

5. Recover your operating system. See “Recovery” on page 37.

6. If the problem persists, contact Lenovo. See Chapter 8 “Help and support” on page 73.

Troubleshooting

Use the troubleshooting information to find solutions to problems that have definite symptoms.

Startup problems

Problem Solution

The computer does not start up when you

press the power button.

• Ensure that the power cord is correctly connected to the rear of the

computer and to a working electrical outlet.

• If the computer has a secondary power switch on the rear of the

computer, ensure that it is switched on.

• The power indicator on the front of the computer is on.

• The computer voltage matches the voltage available at the

electrical outlet for your country or region.

The operating system does not start up from

the correct storage drive or fails to start up

• Ensure that all storage drive signal cables and power cables are

connected correctly.

• Ensure that the storage drive the computer starts up from is listed

as the first startup device in UEFI BIOS.

• In rare cases, the storage drive with the operating system might get

corrupted or damaged. In such cases, you might need to replace

the storage drive.

• If the computer is installed with an Optane memory:

– Ensure that the Optane memory is not removed.

– Ensure that the Optane memory is not damaged. Check the

Optane memory using diagnostic tools.

The computer beeps multiple times before

the operating system starts up. Ensure that no keys are stuck.

30 M75s-1 User Guide

Audio problems

Problem Solution

The audio cannot be heard on the Windows

operating system.

• If you are using powered external speakers that have an On/Off

control, ensure that:

– The On/Off control is set to the On position.

– The speaker power cable is connected to a properly grounded,

functional ac electrical outlet.

• If your external speakers have a volume control, ensure that the

volume is not set too low.

• Click the volume icon in the Windows notification area on the

taskbar. Check the speaker and volume settings. Do not mute the

speaker or set the volume at a very low level.

• If your computer has a front audio panel, ensure that the volume is

not set too low.

• Ensure that your external speakers (and headphones, if used) are

connected to the correct audio connector on the computer. Most

speaker cables are color-coded to match the audio connector.

Note: When external-speaker or headphone cables are connected

to the audio connector, the internal speaker, if present, is disabled.

In most cases, if an audio adapter is installed in one of the

expansion slots, the audio function built into the system board is

disabled. Therefore, you must use the audio connectors on the

audio adapter.

• Ensure that the program you are running is designed for use in the

Microsoft Windows operating system. If the program is designed to

run in DOS, the program does not use the Windows sound feature.

The program must be configured to use SoundBlaster Pro or

SoundBlaster emulation.

• Ensure that the audio device drivers are correctly installed.

The sound does not come from the headset

or headphones.

1. Exit the application that uses the sound device (for example,

Windows Media Player).

2. Right-click the volume icon in the Windows notification area on

the taskbar.

3. Click Playback devices.

4. Select the headset or headphones, and then click Set Default.

5. Click OK.

The sound comes from one of the external

speakers.

• Ensure that the speaker cable is inserted completely into the

connector on the computer.

• Ensure that the cable that connects the left speaker to the right

speaker is securely connected.

• Ensure that the balance settings are set correctly.

1. Right-click the volume icon in the Windows notification area

on the taskbar. Then, click Open Volume Mixer and select the

desired speaker.

2. Click the speaker icon on top of the volume control, and then

click the Levels tab.

Chapter 6.Troubleshooting, diagnostics, and recovery 31

Network problems

Note: The Wi-Fi and Bluetooth features are optional.

Problem Solution

The computer cannot connect to an Ethernet

LAN.

• Connect the cable from the Ethernet connector to the RJ45

connector of the hub.

• Enable the Ethernet LAN feature in UEFI BIOS.

• Enable the Ethernet LAN adapter.

1. Go to Control Panel and view by large icons or small icons.

2. Click Network and Sharing Center ➙ Change adapter

settings.

3. Right-click the Ethernet LAN adapter icon and click Enable.

• Update or reinstall the Ethernet LAN driver.

• Install all networking software that is necessary for your network

environment. Check with your LAN administrator for the necessary

networking software.

• Set the same duplex for the switch port and the adapter. If you

configured the adapter for full duplex, ensure that the switch port is

also configured for full duplex. Setting a wrong duplex mode might

degrade performance, cause data loss, or result in lost

connections.

When a Gigabit Ethernet model computer is

used at a speed of 1000 Mbps, the Ethernet

LAN connection fails or errors occur.

Connect the network cable to the Ethernet connector using Category

5 wiring and a 100 BASE-T hub/switch (not 100 BASE-X).

The Wake On LAN (WOL) feature does not

work. Enable the Wake On LAN feature in UEFI BIOS.

The Wi-Fi feature does not work.

• Enable the Wi-Fi feature in UEFI BIOS.

• Enable all Wi-Fi devices.

1. Right-click the Start button to open the Start context menu.

2. Click Device Manager. Type the administrator password or

provide confirmation, if prompted.

3. Expand Network adapters to display all network devices.

4. Right-click each Wi-Fi device, and then click Enable device.

• Enable the Wi-Fi feature in Windows Settings.

1. Open the Start menu.

2. Click Settings ➙ Network & Internet ➙ Wi-Fi.

3. Enable the Wi-Fi feature.

• Update or reinstall the Wi-Fi driver.

32 M75s-1 User Guide

Problem Solution

The Bluetooth feature does not work.

• Enable the Bluetooth feature in UEFI BIOS.

• Enable all Bluetooth devices.

1. Right-click the Start button to open the Start context menu.

2. Click Device Manager. Type the administrator password or

provide confirmation if prompted.

3. Expand Bluetooth to display all Bluetooth devices. Right-click

each Bluetooth device, and then click Enable device.

4. Expand Network adapters to display all network devices.

Right-click each Bluetooth device, and then click Enable

device.

• Turn on the Bluetooth radio.

1. Open the Start menu.

2. Click Settings ➙ Devices ➙ Bluetooth & other devices.

3. Turn on the Bluetooth switch to enable the Bluetooth feature.

• Update or reinstall the Bluetooth driver.

Sound does not come from the Bluetooth

headset or headphones.

1. Exit the application that uses the sound device (for example,

Windows Media Player).

2. Right-click the volume icon in the Windows notification area on

the taskbar.

3. Click Playback devices.

4. If you are using the headset profile, select Bluetooth Hands-free

Audio, and then click Set Default. If you are using the AV profile,

select Stereo Audio, and then click Set Default.

5. Click OK.

Chapter 6.Troubleshooting, diagnostics, and recovery 33

Performance problems

Problem Solution

Excessive fragmented files exist on the

storage drives.

Note: Depending on the volume of the storage drives and amount of

data stored on the storage drives, the disk-defragmentation process

might take up to several hours.

1. Close any open programs and windows.

2. Open the Start menu.

3. Click Windows System ➙ File Explorer ➙ This PC.

4. Right-click your C drive and then click Properties.

5. Click the Tools tab.

6. Click Optimize. Select the drive as desired, and then click

Optimize.

7. Follow the on-screen instructions.

The free storage drive space is insufficient.

• Clean out your Inbox, Sent Items, and Deleted Items folders from

your e-mail application.

• Clean up your C drive.

1. Open the Start menu.

2. Click Windows System ➙ File Explorer ➙ This PC.

3. Right-click your C drive and then click Properties.

4. Check the amount of free space, and then click Disk Cleanup.

5. A list of unnecessary file categories is displayed. Select the

category you want to delete, and then click OK.

• Disable some Windows features or remove some unnecessary

programs.

1. Go to Control Panel and view by large icons or small icons.

2. Click Programs and Features.

3. Do one of the following:

– To disable some Windows features, click Turn Windows

features on or off. Follow the on-screen instructions.

– To remove some unnecessary programs, select the

program you want to remove, and then click Uninstall/

Change or Uninstall.

The free memory space is insufficient.

• Right-click a blank area on the taskbar and open Task Manager.

Then, end some tasks you are not performing.

• Install additional memory modules.

34 M75s-1 User Guide

Storage drive problems

Problem Solution

Some or all storage drives are missing from

the BIOS menu.

• Ensure that the signal cables and power cables for all the storage

drives are connected correctly.

• Ensure that the computer is configured correctly to support the

storage drives.

– If the computer is installed with SATA storage drives, ensure

that the SATA storage drive enablement module (one to five

storage drives) is installed.

– If the computer is installed with SAS storage drives, ensure that

the SAS storage drive enablement module (one to five storage

drives) or the LSI MegaRAID SAS adapter is installed.

CD or DVD problems

Problem Solution

A CD or DVD does not work.

• Ensure that the optical drive supports the CD or DVD.

• Ensure that the disc is inserted correctly, with its label up.

• Ensure that the disc you are using is clean. To remove dust or

fingerprints, wipe the disc clean with a soft cloth from the center to

the outside. Wiping a disc in a circular motion might cause loss of

data.

• Ensure that the power cable and signal cable are securely

connected to the drive.

• Ensure that the disc you are using is not scratched or damaged.

Try inserting another disc that you know works.

• If you have multiple CD or DVD drives installed (or a combination of

CD and DVD drives), try inserting the disc into the other drive. In

some cases, only one of the drives is connected to the audio

subsystem.

A bootable recovery medium, such as the

Product Recovery CD, cannot be used to

start your computer.

Ensure that the CD or DVD drive is set as the top priority of the boot

priority order in UEFI BIOS.

Note: On some computer models, the startup sequence is

permanently set and cannot be changed.

A black screen is displayed instead of the

DVD video.

• Restart the DVD player program.

• Try a lower screen resolution or color depth.

• Close any open files, and then restart the computer.

A DVD movie does not play.

• Ensure that the disc surface is clean and not scratched.

• Check the disc or package for regional coding. You might need to

purchase a disc with coding for the region where you are using the

computer.

No audio or only an intermittent audio comes

out while a DVD movie is playing.

• Check the volume control settings on the computer and on your

speakers.

• Ensure that the disc surface is clean and not scratched.

• Check all cable connections to and from the speakers.

• Use the DVD menu for the video to select a different audio track.

Chapter 6.Troubleshooting, diagnostics, and recovery 35

Problem Solution

The playback is slow or choppy.

• Disable any background programs, such as AntiVirus or Desktop

Themes.

• Ensure that video resolution is less than 1152 x 864 pixels.

A message indicating invalid disc or no disc

found is displayed.

• Ensure that the disc is in the drive with the shiny side of the disc

facing down.

• Ensure that video resolution is less than 1152 x 864 pixels.

• Ensure that the DVD or CD is inserted into an appropriate optical

drive. For example, do not insert a DVD into a CD-only drive.

Serial connector problems

Problem Solution

The serial connector cannot be accessed.

• Connect the serial cable from the serial connector on the computer

to the serial device. If the serial device has its own power cord,

connect the power cord to a grounded electrical outlet.

• Turn on the serial device and keep the device online.

• Install any programs supplied with the serial device. Refer to the

documentation that comes with the serial device for more

information.

• If you added one serial-connector adapter, ensure that the adapter

is installed correctly.

USB device problems

Problem Solution

A USB device cannot be accessed.

• Connect the USB cable from the USB connector to the USB

device. If the USB device has its own power cord, connect the

power cord to a grounded electrical outlet.

• Turn on the USB device and keep the device online.

• Install any device drivers or programs supplied with the USB

device. Refer to the documentation that comes with the USB

device for more information.

• Disconnect and reconnect the USB connector to reset the USB

device.

• Ensure that the Smart USB Protection function is disabled in UEFI

BIOS.

36 M75s-1 User Guide

Software problems

Problem Solution

Some programs do not work as expected.

1. Check whether the problem is caused by a program.

a. Ensure that the software is compatible with the computer.

Refer to the information supplied with the software for more

information.

b. Verify that other software works correctly on the computer.

c. Verify that the software you are using works on another

computer.

2. If the problem is caused by a program:

• Refer to the printed documentation that comes with the

program or the help system of the program.

• Update the program.

• Uninstall the program and then reinstall it. To download a

program that is preinstalled on your computer, go to https://

support.lenovo.com and follow the on-screen instructions.

Diagnostics

Use diagnostic solutions to test hardware components and report operating-system-controlled settings that

interfere with the correct operation of your computer.

Lenovo diagnostic tools

This section introduces a set of Lenovo diagnostic tools. For more information, go to:

https://pcsupport.lenovo.com/lenovodiagnosticsolutions

Recovery

This section introduces the recovery information of the Windows 10 operating system. Ensure that you read

and follow the on-screen recovery instructions. The data on your computer might be deleted during the

recovery process. To avoid data loss, make a backup copy of all the data that you want to keep.

Restore system files and settings to an earlier point

1. Go to Control Panel and view by large icons or small icons.

2. Click Recovery ➙ Open System Restore. Then, follow the on-screen instructions.

Restore your files from a backup

Note: If you use the File History tool to restore your files from a backup, ensure that you backed up your

data earlier with the tool.

1. Go to Control Panel and view by large icons or small icons.

2. Click File History ➙ Restore personal files. Then, follow the on-screen instructions.

Reset your computer

In the resetting process, you can choose to keep your files or remove them when you reinstall the operating

system.

Note: The items in the graphical user interface (GUI) might change without notice.

Chapter 6.Troubleshooting, diagnostics, and recovery 37

1. Open the Start menu, and then click Settings ➙ Update & Security ➙ Recovery.

2. In the Reset this PC section, click Get started.

3. Follow the on-screen instructions to reset your computer.

Use advanced options

1. Open the Start menu, and then click Settings ➙ Update & security ➙ Recovery.

2. In the Advanced startup section, click Restart now ➙ Troubleshoot ➙ Advanced options.

3. Select a preferred option from the following list, and then follow the on-screen instructions.

• Restore the Windows operating system from a restore point recorded on your computer.

• Restore the Windows operating system from a specific system image.

• Fix problems that prevent the Windows operating system from loading.

• Use the Command Prompt for advanced troubleshooting.

• Change the UEFI firmware settings on your computer.

• Change the startup settings of the Windows operating system.

• Go back to the previous build.

Windows automatic recovery

Note: Ensure that your computer is connected to ac power during the recovery process.

The Windows recovery environment on your computer operates independently from the Windows 10

operating system. It enables you to recover or repair the operating system even if the Windows 10 operating

system fails to start.

After two consecutive failed boot attempts, the Windows recovery environment starts automatically. Then,

you can choose repair and recovery options by following the on-screen instructions.

Create and use a recovery USB device

It is recommended that you create a recovery USB drive as early as possible as a backup for the Windows

recovery programs. With the recovery USB drive, you can troubleshoot and fix the problems even if the

preinstalled Windows recovery programs are damaged. If you did not create a recovery USB drive as a

precautionary measure, you can contact Lenovo Customer Support Center and purchase one from Lenovo.

For a list of the Lenovo Support phone numbers for your country or region, go to:

https://pcsupport.lenovo.com/supportphonelist

Create a recovery USB drive

Attention: The creation process deletes anything stored on the USB drive. To avoid data loss, make a

backup copy of all the data that you want to keep.

1. Ensure that your computer is connected to ac power.

2. Prepare a USB drive with capacity of at least 16 GB. The actual USB capacity required depends on the

size of the recovery image.

3. Connect the prepared USB drive to the computer.

4. Type recovery in the search box. Then, click Create a recovery drive.

5. Click Yes in the User Account Control window to allow the Recovery Media Creator program to start.

6. In the Recovery Drive window, follow the on-screen instructions to create a recovery USB drive.

38 M75s-1 User Guide

Use the recovery USB drive

If your computer cannot be started, go to Chapter 8 “Help and support” on page 73 first to try to solve the

problem by yourself. If the problem persists, use the recovery USB drive to recover your computer.

1. Ensure that your computer is connected to ac power.

2. Connect the recovery USB drive to the computer.

3. Turn on or restart the computer. When the logo screen is displayed, press F12. The Boot Menu window

opens.

4. Select the recovery USB drive as the boot device.

5. Click Troubleshoot to display optional recovery solutions.

6. Select a recovery solution as desired. Then, follow the on-screen instructions to complete the process.

Update the device driver

Attention: Reinstalling device drivers will change the current configuration of the computer.

You should download the latest driver for a component when you notice poor performance from that

component or when you added a component. This action might eliminate the driver as the potential cause of

a problem. Download and install the latest driver by one of the following methods:

• From Lenovo Vantage:

Open Lenovo Vantage to check the available update packages. If the latest UEFI BIOS update package is

available, follow the on-screen instructions to download and install the package.

• From the Lenovo Support Web site:

Go to https://support.lenovo.com and select the entry for your computer. Then, follow the on-screen

instructions to download and install necessary drivers and software.

• From Windows Update:

Note: The device drivers provided by Windows Update might not be tested by Lenovo. It is

recommended that you get device drivers from Lenovo.

1. Open the Start menu.

2. Click Settings ➙ Update & Security ➙ Windows Update.

3. Follow the on-screen instructions.

Chapter 6.Troubleshooting, diagnostics, and recovery 39

40 M75s-1 User Guide

Chapter 7. CRU replacement

What are CRUs

Customer Replaceable Units (CRUs) are parts that can be upgraded or replaced by the customer. Lenovo

computers contain the following types of CRUs:

• Self-service CRUs: Refer to parts that can be installed or replaced easily by customer themselves or by

trained service technicians at an additional cost.

• Optional-service CRUs: Refer to parts that can be installed or replaced by customers with a greater skill

level. Trained service technicians can also provide service to install or replace the parts under the type of

warranty designated for the customer’s machine.

If you intend on installing the CRU, Lenovo will ship the CRU to you. CRU information and replacement

instructions are shipped with your product and are available from Lenovo at any time upon request. You

might be required to return the defective part that is replaced by the CRU. When return is required: (1) return

instructions, a prepaid shipping label, and a container will be included with the replacement CRU; and (2) you

might be charged for the replacement CRU if Lenovo does not receive the defective CRU within thirty (30)

days of your receipt of the replacement CRU. For full details, see the Lenovo Limited Warranty

documentation at:

https://www.lenovo.com/warranty/llw_02

Refer to the following CRU list for your computer.

Self-service CRUs

• Computer cover

• Coin-cell battery

• Dust shield*

• Front bezel

• Keyboard*

• M.2 solid-state drive*

• M.2 solid-state drive bracket*

• Memory module

• Mouse*

• PCI Express card*

• Optical drive*

• Optical drive bracket*

• Power cord

• Primary storage drive (a 2.5-inch or 3.5-inch storage drive)

• Primary storage drive bracket

• Secondary storage drive (a 2.5- inch storage drive)

• Secondary storage drive bracket

• Storage converter

• Vertical stand*

Optional-service CRUs

• Power supply assembly

• Wi-Fi card*

• Wi-Fi card shield*

* for selected models

Replace a CRU

Follow the replacement procedure to replace a CRU.

Vertical stand

Prerequisite

Before you start, read Appendix A “Important safety information” on page 77 and print the following

instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is

cool.

Replacement procedure

1. Turn off the computer and remove all connected devices and cables.

2. Disconnect all power cords from electrical outlets and disconnect all cables from the computer.

3. Unlock any locking device that secures the computer cover. See “Lock the computer” on page 17.

4. Remove the vertical stand.

42 M75s-1 User Guide

5. Disassemble the vertical stand.

6. Assemble the vertical stand.

Chapter 7.CRU replacement 43

7. Install the vertical stand.

8. Reconnect the power cord and all disconnected cables to the computer.

Note: If a locking device is available, use it to lock the computer.

Dust shield

Prerequisite

Before you start, read Appendix A “Important safety information” on page 77 and print the following

instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is

cool.

Replacement procedure

1. Turn off the computer and remove all connected devices and cables.

2. Disconnect all power cords from electrical outlets and disconnect all cables from the computer.

3. Unlock any locking device that secures the computer cover. See “Lock the computer” on page 17.

4. Remove the vertical stand. See “Vertical stand” on page 42.

44 M75s-1 User Guide

5. Remove the dust shield.

6. Install the dust shield.

7. Reinstall all the removed parts. Then, reconnect the power cord and all disconnected cables to the

computer.

Note: If a locking device is available, use it to lock the computer.

Chapter 7.CRU replacement 45

Computer cover

Prerequisite

Before you start, read Appendix A “Important safety information” on page 77 and print the following

instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is

cool.

Replacement procedure

1. Turn off the computer and remove all connected devices and cables.

2. Disconnect all power cords from electrical outlets and disconnect all cables from the computer.

3. Unlock any locking device that secures the computer cover. See “Lock the computer” on page 17.

4. Remove the vertical stand. See “Vertical stand” on page 42.

5. Remove the dust cover. See “Dust shield” on page 44.

6. Lay down the computer so that the computer cover facing up.

7. Remove the computer cover.

46 M75s-1 User Guide

8. Install the computer cover.

9. Place the computer in an upright position.

10. Reinstall all the removed parts. Then, reconnect the power cord and all disconnected cables to the

computer.

Note: If a locking device is available, use it to lock the computer.

Front bezel

Prerequisite

Before you start, read Appendix A “Important safety information” on page 77 and print the following

instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is

cool.

Replacement procedure

1. Lay down the computer so that the computer cover facing up.

2. Remove the computer cover. See “Computer cover” on page 46.

Chapter 7.CRU replacement 47

3. Remove the front bezel.

4. Install the front bezel.

5. Reinstall all the removed parts.

6. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables

to the computer.

Note: If a locking device is available, use it to lock the computer.

48 M75s-1 User Guide

Optical drive

Prerequisite

Before you start, read Appendix A “Important safety information” on page 77 and print the following

instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is

cool.

Replacement procedure

1. Lay down the computer so that the computer cover facing up.

2. Remove the computer cover. See “Computer cover” on page 46.

3. Remove the front bezel. See “Front bezel” on page 47.

4. Disconnect the signal cable and the power cable from the optical drive.

5. Remove the optical drive.

6. Remove the optical drive bracket.

Chapter 7.CRU replacement 49

7. Install the optical drive bracket.

8. Install the optical drive.

9. Connect the signal cable and the power cable to the new optical drive.

10. Reinstall all the removed parts.

11. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables

to the computer.

Note: If a locking device is available, use it to lock the computer.

Pivot the drive bay assembly upward and downward

Prerequisite

Before you start, read Appendix A “Important safety information” on page 77 and print the following

instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is

cool.

50 M75s-1 User Guide

Replacement procedure

1. Lay down the computer so that the computer cover facing up.

2. Remove the computer cover. See “Computer cover” on page 46.

3. Remove the front bezel. See “Front bezel” on page 47.

4. Pivot the drive bay assembly upward.

5. Pivot the drive bay assembly downward.

6. Reinstall all the removed parts.

7. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables

to the computer.

Chapter 7.CRU replacement 51

Note: If a locking device is available, use it to lock the computer.

Primary storage drive (a 2.5-inch or 3.5-inch storage drive)

Prerequisite

Before you start, read Appendix A “Important safety information” on page 77 and print the following

instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is

cool.

Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and

permanent loss of data.

• When handling the internal storage drive, observe the following guidelines:

• Replace the internal storage drive only for upgrade or repair. The internal storage drive is not designed for

frequent changes or replacement.

• Before replacing the internal storage drive, make a backup copy of all the data that you want to keep.

• Do not touch the contact edge of the internal storage drive. Otherwise, the internal storage drive might get

damaged.

• Do not apply pressure to the internal storage drive.

• Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage

drive on a soft material, such as cloth, to absorb physical shocks.

Replacement procedure

1. Lay down the computer so that the computer cover facing up.

2. Remove the computer cover. See “Computer cover” on page 46.

3. Remove the front bezel. See “Front bezel” on page 47.

4. Pivot the drive bay assembly upward. See “Pivot the drive bay assembly upward and downward” on

page 50.

5. Disconnect the signal cable and the power cable from the primary storage drive.

52 M75s-1 User Guide

6. Remove the primary storage drive.

7. Remove the 3.5-inch primary storage drive from the primary storage drive bracket.

Note: If you replace the 2.5-inch primary storage drive, skip this step.

Chapter 7.CRU replacement 53

8. Install the 3.5-inch primary storage drive to primary storage drive bracket.

Note: If you replace the 2.5-inch primary storage drive, skip this step.

9. Remove the 2.5-inch primary storage drive from the storage converter.

Note: If you replace the 3.5-inch primary storage drive, skip this step.

54 M75s-1 User Guide

10. Install the 2.5-inch primary storage drive to the storage converter.

Note: If you replace the 3.5-inch primary storage drive, skip this step.

11. Install the primary storage drive.

12. Connect the signal cable and the power cable to the new primary storage drive.

13. Reinstall all removed parts.

14. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables

to the computer.

Note: If a locking device is available, use it to lock the computer.

Chapter 7.CRU replacement 55

2.5-inch secondary storage drive

Prerequisite

Before you start, read Appendix A “Important safety information” on page 77 and print the following

instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is

cool.

Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and

permanent loss of data.

• When handling the internal storage drive, observe the following guidelines:

• Replace the internal storage drive only for upgrade or repair. The internal storage drive is not designed for

frequent changes or replacement.

• Before replacing the internal storage drive, make a backup copy of all the data that you want to keep.

• Do not touch the contact edge of the internal storage drive. Otherwise, the internal storage drive might get

damaged.

• Do not apply pressure to the internal storage drive.

• Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage

drive on a soft material, such as cloth, to absorb physical shocks.

Replacement procedure

1. Lay down the computer so that the computer cover facing up.

2. Remove the computer cover. See “Computer cover” on page 46.

3. Remove the front bezel. See “Front bezel” on page 47.

4. Pivot the drive bay assembly upward. See “Pivot the drive bay assembly upward and downward” on

page 50.

5. Disconnect the signal cable and the power cable from the primary storage drive.

56 M75s-1 User Guide

6. Remove the outer 2.5-inch secondary storage drive bracket.

7. Remove the inner 2.5-inch secondary storage drive bracket.

8. Remove the 2.5-inch secondary storage drive.

Chapter 7.CRU replacement 57

9. Install the 2.5-inch secondary storage drive.

10. Install the inner 2.5-inch secondary storage drive bracket.

11. Install the outer 2.5-inch secondary storage drive bracket.

58 M75s-1 User Guide

12. Connect the signal cable and the power cable to the new 2.5-inch secondary storage drive.

13. Reinstall all removed parts.

14. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables

to the computer.

Note: If a locking device is available, use it to lock the computer.

M.2 solid-state drive

Prerequisite

Before you start, read Appendix A “Important safety information” on page 77 and print the following

instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is

cool.

Attention: The internal storage drive is sensitive. Inappropriate handling might cause damage and

permanent loss of data.

• When handling the internal storage drive, observe the following guidelines:

• Replace the internal storage drive only for upgrade or repair. The internal storage drive is not designed for

frequent changes or replacement.

• Before replacing the internal storage drive, make a backup copy of all the data that you want to keep.

• Do not touch the contact edge of the internal storage drive. Otherwise, the internal storage drive might get

damaged.

• Do not apply pressure to the internal storage drive.

• Do not make the internal storage drive subject to physical shocks or vibration. Put the internal storage

drive on a soft material, such as cloth, to absorb physical shocks.

Chapter 7.CRU replacement 59

Replacement procedure

1. Lay down the computer so that the computer cover facing up.

2. Remove the computer cover. See “Computer cover” on page 46.

3. Remove the front bezel. See “Front bezel” on page 47.

4. Pivot the drive bay assembly upward. See “Pivot the drive bay assembly upward and downward” on

page 50.

5. Depending on your computer model, refer to one of the following to replace the M.2 solid-state drive.

6. Refer to the following steps to replace the type 1 M.2 solid-state drive.

• Pull out the stopper.

• Remove the M.2 solid-state drive.

• Install the M.2 solid-state drive.

60 M75s-1 User Guide

• Insert the stopper.

7. Refer to the following steps to replace the type 2 M.2 solid-state drive.

• Pull out the stopper.

• Remove the M.2 solid-state drive.

Chapter 7.CRU replacement 61

• Install the M.2 solid-state drive.

• Insert the stopper.

8. Reinstall all removed parts.

9. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables

to the computer.

Note: If a locking device is available, use it to lock the computer.

62 M75s-1 User Guide

Coin-cell battery

Prerequisite

Before you start, read Appendix A “Important safety information” on page 77 and print the following

instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is

cool.

DANGER

If the coin-cell battery is incorrectly replaced, there is danger of an explosion. The coin-cell battery

contains a small amount of harmful substance. To avoid possible injury:

• Replace only with a battery of the type recommended by Lenovo.

• Keep the battery away from fire.

• Do not expose it to excessive heat.

• Do not expose it to water or rain.

• Do not short-circuit it.

• Do not drop, crush, puncture the battery, or make it subject to strong forces. Battery abuse or

mishandling can cause the battery to overheat, which can cause gasses or flame to "vent" from

the battery or coin-cell battery.

Note: To dispose of the coin-cell battery, refer to “Lithium coin-cell battery notice” in the Safety and

Warranty Guide.

Your computer has a special type of memory that maintains the date, time, and settings for built-in features,

such as parallel connector assignments (configurations). A coin-cell battery keeps this information active

when you turn off the computer.

The coin-cell battery normally requires no charging or maintenance throughout its life; however, no coin-cell

battery lasts forever. If the coin-cell battery fails, the date, time, and configuration information (including

passwords) is lost. An error message is displayed when you turn on the computer.

Replacement procedure

1. Lay down the computer so that the computer cover facing up.

2. Remove the computer cover. See “Computer cover” on page 46.

3. Remove the front bezel. See “Front bezel” on page 47.

4. Pivot the drive bay assembly upward. See “Pivot the drive bay assembly upward and downward” on

page 50.

5. Remove the coin-cell battery.

Chapter 7.CRU replacement 63

6. Install the coin-cell battery.

7. Reinstall all removed parts.

8. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables

to the computer.

Note: If a locking device is available, use it to lock the computer.

Memory module

Prerequisite

Before you start, read Appendix A “Important safety information” on page 77 and print the following

instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is

cool.

Ensure that you follow the installation order for memory modules shown in the following illustration.

64 M75s-1 User Guide

Replacement procedure

1. Lay down the computer so that the computer cover facing up.

2. Remove the computer cover. See “Computer cover” on page 46.

3. Remove the front bezel. See “Front bezel” on page 47.

4. Pivot the drive bay assembly upward. See “Pivot the drive bay assembly upward and downward” on

page 50.

5. Remove a memory module.

6. Install a memory module.

Chapter 7.CRU replacement 65

7. Reinstall all removed parts.

8. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables

to the computer.

Note: If a locking device is available, use it to lock the computer.

PCI Express card

Prerequisite

Before you start, read Appendix A “Important safety information” on page 77 and print the following

instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is

cool.

Replacement procedure

1. Lay down the computer so that the computer cover facing up.

2. Remove the computer cover. See “Computer cover” on page 46.

3. Remove the front bezel. See “Front bezel” on page 47.

4. Remove the PCI Express card.

66 M75s-1 User Guide

Note: If the card is held in place by a retaining latch, press the latch as shown to disengage the latch.

Then, gently remove the card from the slot.

5. Install the PCI Express card.

6. Reinstall all removed parts.

7. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables

to the computer.

Note: If a locking device is available, use it to lock the computer.

Chapter 7.CRU replacement 67

Wi-Fi card

Prerequisite

Before you start, read Appendix A “Important safety information” on page 77 and print the following

instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is

cool.

Replacement procedure

1. Lay down the computer so that the computer cover facing up.

2. Remove the computer cover. See “Computer cover” on page 46.

3. Remove the front bezel. See “Front bezel” on page 47.

4. Pivot the drive bay assembly upward. See “Pivot the drive bay assembly upward and downward” on

page 50.

5. Remove the screw that secures the Wi-fi card. Then, remove the Wi-Fi card shield.

6. Disconnect the antenna cables from the Wi-Fi card.

7. Remove the Wi-Fi card.

8. Install the Wi-fi card.

68 M75s-1 User Guide

9. Reconnect the antenna cables to the Wi-Fi card, and install the screw to secure the Wi-Fi card.

10. Install the Wi-Fi card shield.

11. Reinstall all removed parts.

12. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables

to the computer.

Note: If a locking device is available, use it to lock the computer.

Power supply assembly

Prerequisite

Before you start, read Appendix A “Important safety information” on page 77 and print the following

instructions.

Before you open the computer cover, turn off the computer and wait several minutes until the computer is

cool.

Chapter 7.CRU replacement 69

Although there are no moving parts in the computer after the power cord has been disconnected, the

following warnings are required for your safety and proper Underwriters Laboratories (UL) certification.

CAUTION:

Hazardous moving parts. Keep fingers and other body parts away.

CAUTION:

Never remove the cover on a power supply or any part that has the following label attached.

Hazardous voltage, current, and energy levels are present inside any component that has this label

attached. There are no serviceable parts inside these components. If you suspect a problem with one

of these parts, contact a service technician.

Replacement procedure

1. Lay down the computer so that the computer cover facing up.

2. Remove the computer cover. See “Computer cover” on page 46.

3. Remove the front bezel. See “Front bezel” on page 47.

4. Pivot the drive bay assembly upward. See “Pivot the drive bay assembly upward and downward” on

page 50.

5. Remove the power supply assembly.

70 M75s-1 User Guide

6. Install the power supply assembly.

7. Reinstall all removed parts.

8. Place the computer in an upright position. Then, reconnect the power cord and all disconnected cables

to the computer.

Note: If a locking device is available, use it to lock the computer.

Chapter 7.CRU replacement 71

72 M75s-1 User Guide

Chapter 8. Help and support

Self-help resources

Use the following self-help resources to learn more about the computer and troubleshoot problems.

Resources How to access?

Use Lenovo Vantage to:

• Configure device settings.

• Download and install UEFI BIOS, drivers and firmware

updates.

• Secure you computer from outside threats.

• Check the computer warranty status.

• Access User Guide and helpful articles.

• Open the Start menu and click Lenovo Vantage.

• Use Windows Search.

Product documentation:

• Safety and Warranty Guide

• Setup Guide

• This User Guide

• Regulatory Notice

1. Go to https://support.lenovo.com.

2. Detect your computer or select computer model

manually.

3. Select Documentation and filter out the

documentation you want.

Lenovo Support Web site with the latest support

information of the following:

• Drivers and software

• Diagnostic solutions

• Product and service warranty

• Product and parts details

• Knowledge base and frequently asked questions

https://support.lenovo.com

Windows help information

• Open the Start menu and click Get Help or Tips.

• Use Windows Search or the Cortana® personal

assistant.

• Microsoft support Web site:

https://support.microsoft.com

Call Lenovo

If you have tried to correct the problem yourself and still need help, you can call Lenovo Customer Support

Center.

Before you contact Lenovo

Prepare the following before you contact Lenovo:

1. Record the problem symptoms and details:

• What is the problem? Is it continuous or intermittent?

• Any error message or error code?

• What operating system are you using? Which version?

• Which software applications were running at the time of the problem?

• Can the problem be reproduced? If so, how?

2. Record the system information:

• Product name

• Machine type and serial number

The following illustration shows where to find the machine type and serial number of your computer.

Lenovo Customer Support Center

During the warranty period, you can call Lenovo Customer Support Center for help.

Telephone numbers

For a list of the Lenovo Support phone numbers for your country or region, go to:

https://pcsupport.lenovo.com/supportphonelist

74 M75s-1 User Guide

Note: Phone numbers are subject to change without notice. If the number for your country or region is not

provided, contact your Lenovo reseller or Lenovo marketing representative.

Services available during the warranty period

• Problem determination - Trained personnel are available to assist you with determining if you have a

hardware problem and deciding what action is necessary to fix the problem.

• Lenovo hardware repair - If the problem is determined to be caused by Lenovo hardware under warranty,

trained service personnel are available to provide the applicable level of service.

• Engineering change management - Occasionally, there might be changes that are required after a product

has been sold. Lenovo or your reseller, if authorized by Lenovo, will make selected Engineering Changes

(ECs) that apply to your hardware available.

Services not covered

• Replacement or use of parts not manufactured for or by Lenovo or nonwarranted parts

• Identification of software problem sources

• Configuration of UEFI BIOS as part of an installation or upgrade

• Changes, modifications, or upgrades to device drivers

• Installation and maintenance of network operating systems (NOS)

• Installation and maintenance of programs

For the terms and conditions of the Lenovo Limited Warranty that apply to your Lenovo hardware product,

see “Warranty information” in the Safety and Warranty Guide that comes with your computer.

Purchase additional services

During and after the warranty period, you can purchase additional services from Lenovo at:

https://www.lenovo.com/services

Service availability and service name might vary by country or region.

Chapter 8.Help and support 75

76 M75s-1 User Guide

Appendix A. Important safety information

Safety notices

This information can help you safely use your computer. Follow and retain all information included with your

computer. The information in this document does not alter the terms of your purchase agreement or the

Limited Warranty. For more information, see "Warranty Information" in the Safety and Warranty Guide that

comes with your computer.

Customer safety is important. Our products are developed to be safe and effective. However, personal

computers are electronic devices. Power cords, power adapters, and other features can create potential

safety risks that can result in physical injury or property damage, especially if misused. To reduce these risks,

follow the instructions included with your product, observe all warnings on the product and in the operating

instructions, and review the information included in this document carefully. By carefully following the

information contained in this document and provided with your product, you can help protect yourself from

hazards and create a safer computer work environment. If the computer is used in a manner not specified by

the manufacturer, the protection provided by the computer may be impaired.

Note: This information includes references to power adapters and batteries. In addition, some products

(such as speakers and monitors) ship with external power adapters. If you have such a product, this

information applies to your product. In addition, computer products contain a coin-sized internal battery that

provides power to the system clock even when the computer is unplugged, so the battery safety information

applies to all computer products.

Conditions that require immediate action

Products can become damaged due to misuse or neglect. Some product damage is serious enough

that the product should not be used again until it has been inspected and, if necessary, repaired by an

authorized servicer.

As with any electronic device, pay close attention to the product when it is turned on.

On very rare occasions, you might notice an odor or see a puff of smoke or sparks vent from your

product. You might also hear sounds like popping, cracking, or hissing. These might merely mean that

an internal electronic component has failed in a safe and controlled manner. Or, they might indicate a

potential safety issue. Do not take risks or attempt to diagnose the situation yourself. Contact the

Customer Support Center for further guidance. For a list of Service and Support phone numbers, see

the following Web site:

https://pcsupport.lenovo.com/supportphonelist

Frequently inspect your computer and its components for damage, wear, or signs of danger. If you

have any question about the condition of a component, do not use the product. Contact the Customer

Support Center or the product manufacturer for instructions on how to inspect the product and have it

repaired, if necessary.

In the unlikely event that you notice any of the following conditions, or if you have any safety concerns

with your product, stop using the product and unplug it from the power source and

telecommunication lines until you can speak to the Customer Support Center for further guidance.

• Power cords, plugs, power adapters, extension cords, surge protectors, or power supplies that are

cracked, broken, or damaged.

• Signs of overheating, smoke, sparks, or fire.

• Damage to a battery (such as cracks, dents, or creases), discharge from a battery, or a buildup of foreign

substances on the battery.

• A cracking, hissing, or popping sound, or strong odor that comes from the product.

• Signs that liquid has been spilled or an object has fallen onto the computer product, the power cord, or

power adapter.

• The computer product, power cord, or power adapter has been exposed to water.

• The product has been dropped or damaged in any way.

• The product does not operate normally when you follow the operating instructions.

Note: If you notice these conditions with a product (such as an extension cord) that is not manufactured for

or by Lenovo, stop using that product until you can contact the product manufacturer for further instructions,

or until you get a suitable replacement.

Service and upgrades

Do not attempt to service a product yourself unless instructed to do so by the Customer Support Center or

your documentation. Only use a Service Provider who is approved to repair your particular product.

Note: Some computer parts can be upgraded or replaced by the customer. Upgrades typically are referred

to as options. Replacement parts approved for customer installation are referred to as Customer

Replaceable Units, or CRUs. Lenovo provides documentation with instructions when it is appropriate for

customers to install options or replace CRUs. You must closely follow all instructions when installing or

replacing parts. The Off state of a power indicator does not necessarily mean that voltage levels inside a

product are zero. Before you remove the covers from a product equipped with a power cord, always ensure

that the power is turned off and that the product is unplugged from any power source. If you have any

questions or concerns, contact the Customer Support Center.

Although there are no moving parts in the computer after the power cord has been disconnected, the

following warnings are required for your safety.

Moving Parts:

Keep fingers and other parts of your body away from hazardous, moving parts. If you suffer an injury, seek

medical care immediately.

Hot Surface:

Avoid contact with hot components inside the computer. During operation, some components become hot

enough to burn the skin. Before you open the computer cover, turn off the computer, disconnect power, and

wait approximately 10 minutes for the components to cool.

After replacing a CRU, reinstall all protective covers, including the computer cover, before connecting power

and operating the computer. This action is important to help prevent unexpected electrical shock and help

ensure the containment of an unexpected fire that could happen under extremely rare conditions.

78 M75s-1 User Guide

Sharp Edges:

When replacing CRUs, be cautious of sharp edges or corners that might cause injury. If you suffer an injury,

seek medical care immediately.

Power cords and power adapters

DANGER

Use only the power cords and power adapters supplied by the product manufacturer.

The power cords shall be safety approved. For Germany, it shall be H03VV-F, 3G, 0.75 mm2, or

better. For other countries, the suitable types shall be used accordingly.

Never wrap a power cord around a power adapter or other object. Doing so can stress the cord in

ways that can cause the cord to fray, crack, or crimp. This can present a safety hazard.

Always route power cords so that they will not be walked on, tripped over, or pinched by objects.

Protect power cords and power adapters from liquids. For instance, do not leave your power cord

or power adapter near sinks, tubs, toilets, or on floors that are cleaned with liquid cleansers. Liquids

can cause a short circuit, particularly if the power cord or power adapter has been stressed by

misuse. Liquids also can cause gradual corrosion of power cord terminals and/or the connector

terminals on a power adapter, which can eventually result in overheating.

Ensure that all power cord connectors are securely and completely plugged into receptacles.

Do not use any power adapter that shows corrosion at the ac input pins or shows signs of

overheating (such as deformed plastic) at the ac input pins or anywhere on the power adapter.

Do not use any power cords where the electrical contacts on either end show signs of corrosion or

overheating or where the power cord appears to have been damaged in any way.

To prevent possible overheating, do not cover the power adapter with clothing or other objects

when the power adapter is plugged into an electrical outlet.

Power cord notice

Note: The power cord and adapter provided with this product are intended to be used with this product

only. Do not use them with any other products.

For your safety, Lenovo provides a power cord with a grounded attachment plug to use with this product. To

avoid electrical shock, always use the power cord and plug with a properly grounded outlet.

Power cords provided by Lenovo in the United States and Canada are listed by Underwriter’s Laboratories

(UL) and certified by the Canadian Standards Association (CSA).

Appendix A. Important safety information 79

For units intended to be operated at 115 volts: Use a UL-listed and CSA-certified cord set consisting of a

minimum 18 AWG, Type SVT or SJT, three-conductor cord, a maximum of 15 feet in length and a parallel

blade, grounding-type attachment plug rated 10 amperes, 125 volts.

For units intended to be operated at 230 volts (U.S. use): Use a UL-listed and CSA-certified cord set

consisting of a minimum 18 AWG, Type SVT or SJT, three-conductor cord, a maximum of 15 feet in length

and a tandem blade, grounding-type attachment plug rated 10 amperes, 250 volts.

For units intended to be operated at 230 volts (outside the U.S.): Use a cord set with a grounding-type

attachment plug. The cord set should have the appropriate safety approvals for the country in which the

equipment will be installed.

Power cords provided by Lenovo for a specific country or region are usually available only in that country or

region.

For units intended to be operated in Germany: The power cords must be safety approved. For Germany, it

must be H05VV-F, 3G, 0.75 mm2, or better. For other countries, the suitable types must be used accordingly.

For units intended to be operated in Denmark: Use a cord set with a grounding-type attachment plug. The

cord set should have the appropriate safety approvals for the country in which the equipment will be

installed.

For units intended to be operated in Norway, Sweden, Finland: Use a cord set with a two-prong attachment

plug. The cord set should have the appropriate safety approvals for the country in which the equipment will

be installed.

If you intend to use your PC in a country or region that is different from your ordering location, please

purchase an additional Lenovo power cord for the country or region where the PC will be used. Refer to the

power cord guide provided in our Web site, https://support.lenovo.com, for details. Some countries and

regions support multiple voltages, so make sure you order the appropriate power cord for the intended

voltage.

Extension cords and related devices

Ensure that extension cords, surge protectors, uninterruptible power supplies, and power strips that you use

are rated to handle the electrical requirements of the product. Never overload these devices. If power strips

are used, the load should not exceed the power strip input rating. Consult an electrician for more information

if you have questions about power loads, power requirements, and input ratings.

80 M75s-1 User Guide

Plugs and outlets

DANGER

If a receptacle (power outlet) that you intend to use with your computer equipment appears to be

damaged or corroded, do not use the outlet until it is replaced by a qualified electrician.

Do not bend or modify the plug. If the plug is damaged, contact the manufacturer to obtain a

replacement.

Do not share an electrical outlet with other home or commercial appliances that draw large

amounts of electricity; otherwise, unstable voltage might damage your computer, data, or attached

devices.

Some products are equipped with a three-pronged plug. This plug fits only into a grounded

electrical outlet. This is a safety feature. Do not defeat this safety feature by trying to insert it into a

non-grounded outlet. If you cannot insert the plug into the outlet, contact an electrician for an

approved outlet adapter or to replace the outlet with one that enables this safety feature. Never

overload an electrical outlet. The overall system load should not exceed 80 percent of the branch

circuit rating. Consult an electrician for more information if you have questions about power loads

and branch circuit ratings.

Be sure that the power outlet you are using is properly wired, easily accessible, and located close to

the equipment. Do not fully extend power cords in a way that will stress the cords.

Be sure that the power outlet provides the correct voltage and current for the product you are

installing.

Carefully connect and disconnect the equipment from the electrical outlet.

Power supply statement

Never remove the cover on a power supply or any part that has the following label attached.

Hazardous voltage, current, and energy levels are present inside any component that has this label attached.

There are no serviceable parts inside these components. If you suspect a problem with one of these parts,

contact a service technician.

External devices

CAUTION:

Do not connect or disconnect any external device cables other than Universal Serial Bus (USB) and

1394 cables while the computer power is on; otherwise, you might damage your computer. To avoid

possible damage to attached devices, wait at least five seconds after the computer is shut down to

disconnect external devices.

Appendix A. Important safety information 81

Lithium coin-cell battery notice

DANGER

Danger of explosion if battery is incorrectly replaced.

If the coin-cell battery is not a CRU, do not attempt to replace the coin-cell battery. Replacement of

the battery must be done by a Lenovo-authorized repair facility or technician.

The Lenovo-authorized repair facilities or technicians recycle Lenovo batteries according to local

laws and regulations.

When replacing the lithium coin-cell battery, use only the same type or equivalent type that is recommended

by the manufacturer. The battery contains lithium and can explode if not properly used, handled, or disposed

of. Swallowing the lithium coin-cell battery will cause chocking or severe internal burns in just two hours and

might even result in death.

Keep batteries away from children. If the lithium coin-cell battery is swallowed or placed inside any part of

the body, seek medical care immediately.

Do not:

• Throw or immerse into water

• Heat to more than 100 °C (212°F)

• Repair or disassemble

• Leave in an extremely low air pressure environment

• Leave in an extremely high-temperature environment

• Crush, puncture, cut, or incinerate

Dispose of the battery as required by local ordinances or regulations.

The following statement applies to users in the state of California, U.S.A.

California Perchlorate Information:

Products containing manganese dioxide lithium coin-cell batteries may contain perchlorate.

Perchlorate Material - special handling may apply, see https://www.dtsc.ca.gov/hazardouswaste/

perchlorate/.

Heat and product ventilation

Computers, power adapters, and many accessories can generate heat when turned on and when batteries

are charging. Always follow these basic precautions:

• Do not leave your computer, power adapter, or accessories in contact with your lap or any part of your

body for an extended period when the products are functioning or when the battery is charging. Your

82 M75s-1 User Guide

computer, power adapter, and many accessories produce some heat during normal operation. Extended

contact with the body could cause discomfort or, potentially, a skin burn.

• Do not charge the battery or operate your computer, power adapter, or accessories near flammable

materials or in explosive environments.

• Ventilation slots, fans, and heat sinks are provided with the product for safety, comfort, and reliable

operation. These features might inadvertently become blocked by placing the product on a bed, sofa,

carpet, or other flexible surface. Never block, cover, or disable these features.

Inspect your desktop computer for dust accumulation at least once every three months. Before inspecting

your computer, turn off the power and unplug the computer's power cord from the electrical outlet; then

remove any dust from vents and perforations in the bezel. If you notice external dust accumulation, then

examine and remove dust from the inside of the computer including heat sink inlet fins, power supply vents,

and fans. Always turn off and unplug the computer before opening the cover. If possible, avoid operating

your computer within two feet of high-traffic areas. If you must operate your computer in or near a high-traffic

area, inspect and, if necessary, clean your computer more frequently.

For your safety and to maintain optimum computer performance, always follow these basic precautions with

your desktop computer:

• Keep the cover closed whenever the computer is plugged in.

• Regularly inspect the outside of the computer for dust accumulation.

• Remove dust from vents and any perforations in the bezel. More frequent cleanings might be required for

computers in dusty or high-traffic areas.

• Do not restrict or block any ventilation openings.

• Do not store or operate your computer inside furniture, as this might increase the risk of overheating.

• Airflow temperatures into the computer should not exceed 35°C (95°F).

• Do not install air filtration devices. They may interfere with proper cooling.

Electrical current safety information

DANGER

Electric current from power, telephone, and communication cables is hazardous.

To avoid a shock hazard:

• Do not use your computer during a lightning storm.

• Do not connect or disconnect any cables or perform installation, maintenance, or reconfiguration

of this product during an electrical storm.

• Connect all power cords to a properly wired and grounded electrical outlet.

• Connect properly wired outlets to any equipment that will be attached to this product.

• Whenever possible, use one hand only to connect or disconnect signal cables.

• Never turn on any equipment when there is evidence of fire, water, or structural damage.

• Disconnect the attached power cords, battery, and all the cables before you open the device

covers, unless instructed otherwise in the installation and configuration procedures.

• Do not use your computer until all internal parts enclosures are fastened into place. Never use

the computer when internal parts and circuits are exposed.

Appendix A. Important safety information 83

DANGER

Connect and disconnect cables as described in the following procedures when installing, moving,

or opening covers on this product or attached devices.

To connect:

1. Turn everything OFF.

2. First, attach all cables to devices.

3. Attach signal cables to connectors.

4. Attach power cords to outlets.

5. Turn devices ON.

To disconnect:

1. Turn everything OFF.

2. First, remove power cords from outlets.

3. Remove signal cables from connectors.

4. Remove all cables from devices.

The power cord must be disconnected from the wall outlet or receptacle before installing all other electrical

cables connected to the computer.

The power cord may be reconnected to the wall outlet or receptacle only after all other electrical cables have

been connected to the computer.

DANGER

During electrical storms, do not perform any replacement and do not connect the telephone cable

to or disconnect it from the telephone outlet on the wall.

Laser safety information

CAUTION:

When laser products (such as CD-ROMs, DVD drives, fiber optic devices, or transmitters) are

installed, note the following:

• Do not remove the covers. Removing the covers of the laser product could result in exposure to

hazardous laser radiation. There are no serviceable parts inside the device.

• Use of controls or adjustments or performance of procedures other than those specified herein

might result in hazardous radiation exposure.

DANGER

Some laser products contain an embedded Class 3B laser diode. Note the following:

Laser radiation when open. Do not stare into the beam, do not view directly with optical

instruments, and avoid direct exposure to the beam.

84 M75s-1 User Guide

Liquid crystal display (LCD) notice

DANGER

To avoid shock hazards:

• Do not remove the covers.

• Do not operate this product unless the stand is attached.

• Do not connect or disconnect this product during an electrical storm.

• The power cord plug must be connected to a properly wired and grounded power outlet.

• Any equipment to which this product will be attached must also be connected to properly wired

and grounded power outlets.

• To isolate the monitor from the electrical supply, you must remove the plug from the power

outlet. The power outlet should be easily accessible.

Handling:

• If your monitor weighs more than 18 kg (39.68 lb), we recommend that it be moved or lifted by two people.

Product disposal (TFT monitors):

• The fluorescent lamp in the liquid crystal display contains mercury; dispose according to local, state, or

federal laws.

Battery warnings:

• Risk of explosion if battery is replaced by an incorrect type.

• Dispose of used batteries according to the instructions.

Use earphones, headphones, or a headset

• If your computer has both a headphone connector and an audio line-out connector, always use the

headphone connector for earphones, headphones, or a headset. However, the headphone connector

does not support the microphone of the headset.

• If your computer has both a headset connector and an audio line-out connector, always use the headset

connector for earphones, headphones, or a headset.

Excessive sound pressure from earphones and headphones can cause hearing loss. Adjustment of the

equalizer to maximum increases the earphone and headphone output voltage and the sound pressure level.

Therefore, to protect your hearing, adjust the equalizer to an appropriate level.

Excessive use of headphones or earphones for a long period of time at high volume can be dangerous if the

output of the headphone or earphone connectors do not comply with specifications of EN 50332-2. The

headphone output connector of your computer complies with EN 50332-2 Sub clause 7. This specification

limits the computer’s maximum wide band true RMS output voltage to 150 mV. To help protect against

hearing loss, ensure that the headphones or earphones you use also comply with EN 50332-2 (Clause 7

Appendix A. Important safety information 85

Limits) or a wide band characteristic voltage of 75 mV. Using headphones that do not comply with EN 50332-

2 can be dangerous due to excessive sound pressure levels.

If your Lenovo computer came with headphones or earphones in the package, as a set, the combination of

the headphones or earphones and the computer already complies with the specifications of EN 50332-1. If

different headphones or earphones are used, ensure that they comply with EN 50332-1 (Clause 6.5

Limitation Values). Using headphones that do not comply with EN 50332-1 can be dangerous due to

excessive sound pressure levels.

Choking hazard notice

CHOKING HAZARD – Product contains small parts.

Keep away from children under three years.

Plastic bag notice

DANGER

Plastic bags can be dangerous. Keep plastic bags away from babies and children to avoid danger of

suffocation.

Glass parts notice

CAUTION:

Some parts of your product may be made of glass. This glass could break if the product is dropped on

a hard surface or receives a substantial impact. If glass breaks, do not touch or attempt to remove it.

Stop using your product until the glass is replaced by trained service personnel.

Computer placement notices

Inappropriate computer placement might cause harm to children.

• Place the computer on a sturdy piece of low-rise furniture or furniture that has been anchored.

• Do not place the computer at the edge of the furniture.

• Keep the computer cables out of the reach of children.

• Some items, such as toys, might attract children. Keep such items away from the computer.

Supervise children in rooms where the above safety instructions cannot be fully implemented.

86 M75s-1 User Guide

Hazardous energy statement

DANGER

Disconnect all power cords from electrical outlets before removing the computer cover or any part

that has the above label attached.

DO NOT disassemble components that have the above label attached. There are no serviceable parts inside

these components.

Your product is designed for safe use. However, hazardous voltage, current, and energy levels are present

inside any component that has this label attached. Disassembling of these components might cause fire or

might even result in death. If you suspect a problem with one of these parts, contact a service technician.

CAUTION:

Bright Light, possible skin or eye damage. Disconnect power before servicing.

CAUTION:

Infrared Light, possible skin or eye damage. Disconnect power before servicing.

Eye comfort

The property of the display in combination with following notes result in reduced eye fatigue and increased

comfort.

For tips on how to minimize visual fatigue, please go to https://www.lenovo.com/us/en/safecomp/ to visit

“Minimizing Visual Fatigue”.

Tip-over hazard prevention notice

The computer may cause harm to children if it is not located in an appropriate place. Follow the tips below to

protect children from harm caused by the computer tipping over:

• Place the computers or monitors on sturdy furniture with a low base or furniture that has been anchored.

Push the computers or monitors as far from the edge of the furniture as possible..

• Keep remote controls, toys, and other items that might attract children away from the computers or

monitors

• Keep the computer or monitor cables out the reach of the children.

• Supervise children in rooms where these safety tips have not been followed.

CAUTION:

Some parts of your product may be made of glass. This glass could break if the product is dropped on

a hard surface or receives a substantial impact. If glass breaks, do not touch it or attempt to remove

it. Stop using your product until the glass is replaced by trained service personnel.

Appendix A. Important safety information 87

Remote control

CAUTION:

Do not use rechargeable batteries in this device.

Static electricity prevention

Static electricity, although harmless to you, can seriously damage computer components and options.

Improper handling of static-sensitive parts can damage the part. When you unpack an option or CRU, do not

open the static-protective package containing the part until the instructions direct you to install it.

When you handle options or CRUs, or perform any work inside the computer, take the following precautions

to avoid static-electricity damage:

• Limit your movement. Movement can cause static electricity to build up around you.

• Always handle components carefully. Handle adapters, memory modules, and other circuit boards by the

edges. Never touch exposed circuitry.

• Prevent others from touching components.

• When you install a static-sensitive option or CRU, touch the static-protective package containing the part

to a metal expansion-slot cover or other unpainted metal surface on the computer for at least two

seconds. This reduces static electricity in the package and your body.

• When possible, remove the static-sensitive part from the static-protective packaging and install the part

without setting it down. When this is not possible, place the static-protective packaging on a smooth, level

surface and place the part on it.

• Do not place the part on the computer cover or other metal surface.

Operating environment

Maximum altitude (without pressurization)

• Operating: From -15.2 m (-50 ft) to 3048 m (10 000 ft)

• Storage: From -15.2 m (-50 ft) to 10 668 m (35 000 ft)

Temperature

• Operating: From 10°C (50°F) to 35°C (95°F)

• Storage in original shipping package: From -40°C (-40°F) to 60°C (140°F)

• Storage without package: From -10°C (14°F) to 60°C (140°F)

Note: If your computer is stored or transported in temperatures less than 10°C (50°F), allow the computer to

rise slowly to an optimal operating temperature before use. This process might take up to two hours. Using

the computer in a lower operating temperature might result in irreparable damage to your computer.

Relative humidity

• Operating: 20%-80% (non-condensing)

• Storage: 20%–90% (non-condensing)

88 M75s-1 User Guide

Cleaning and maintenance

With appropriate care and maintenance, your computer will serve you reliably. The following topics offer

information to help you keep your computer working with best performance.

Basic maintenance tips

Here are some basic points about keeping your computer functioning properly:

• Keep the computer in a clean, dry environment. Ensure that the computer rests on a flat, steady surface.

• Do not cover any of air vents. These air vents provide airflow to keep the computer from overheating.

• Keep electrical appliances such as an electric fan, radio, high-powered speakers, air conditioner, and

microwave oven away from your computer because the strong magnetic fields generated by these

appliances can damage the monitor and data on the storage drive.

• Keep food and drinks away from all parts of the computer. Food particles and spills might make the

keyboard and mouse stick and unusable.

• Do not get the power switches or other controls wet. Moisture can damage these parts and cause an

electrical hazard.

• Always disconnect a power cord by grasping the plug instead of the cord.

• Keep the computer software, device drivers, and operating system up-to-date.

• Empty your recycle bin on a regular basis.

• Clean out your Inbox, Sent Items, and Deleted Items folders in your e-mail application on a regular basis.

• Clean up files and free up storage drive space and memory space occasionally to prevent performance

problems.

• Keep a log book. Entries might include major software or hardware changes, device-driver updates,

intermittent problems and what you did to resolve them, and other issues you might have experienced.

The cause of a problem might be change in hardware, change in software, or any other actions that might

have taken place. A log book can help you or a Lenovo technician determine the cause of a problem.

• Back up your data on the storage drive regularly. You can restore the storage drive from a backup.

• Create a recovery medium as early as possible. You can use the recovery medium to recover your

operating system even if Windows fails to start up.

• Get the most up-to-date operating system update patches, software programs, and device drivers.

Maintenance tips about moving the computer

Before moving the computer, take the following precautions:

1. Back up your data on the storage drive.

2. Remove any media from the drives and turn off all connected devices and the computer. Then,

disconnect all power cords from electrical outlets and disconnect all cables that are connected to the

computer.

3. If you saved the original shipping cartons and packing materials, use them to pack the units. If you are

using different cartons, cushion the units to avoid damage.

When you move the computer to another country or region, you must take local electrical standards into

consideration. If the local electrical outlet style is different from the type you are currently using, contact the

Lenovo Customer Support Center to purchase either an electrical plug adapter or a new power cord.

Clean your computer

CAUTION:

Appendix A. Important safety information 89

Remove any media from the drives and turn off all connected devices and the computer. Then,

disconnect all power cords from electrical outlets and disconnect all cables that are connected to the

computer.

It is a good practice to clean your computer periodically to protect the surfaces and ensure trouble-free

operation.

Clean the computer surface: Wipe it with a lint-free cloth dampened in mild soap and water. Avoid applying

liquids directly to the surface.

Clean the keyboard: Wipe the keys one by one with a lint-free cloth dampened in mild soap and water. If

you wipe several keys at a time, the cloth might hook onto an adjacent key and possibly damage it. Avoid

spraying cleaner directly onto the keyboard. To remove any crumbs or dust from beneath the keys, you can

use a camera blower with a brush or use cool air from a hair dryer.

Clean the computer screen: Scratches, oil, dust, chemicals, and ultraviolet light can affect the performance

of your computer screen. Use a dry, soft lint-free cloth to wipe the screen gently. If you see a scratchlike

mark on your screen, it might be a stain. Wipe or dust the stain gently with a soft, dry cloth. If the stain

remains, moisten a soft, lint-free cloth with water or eyeglass cleaner, but do not apply liquids directly to your

computer screen. Ensure that the computer screen is dry before closing it.

90 M75s-1 User Guide

Appendix B. Accessibility and ergonomic information

This chapter provides information about accessibility and ergonomics.

Accessibility information

Lenovo is committed to providing users who have hearing, vision, and mobility limitations with greater

access to information and technology. This section provides information about the ways these users can get

the most out of their computer experience. You also can get the most up-to-date accessibility information

from the following Web site:

https://www.lenovo.com/accessibility

Keyboard shortcuts

The following list contains keyboard shortcuts that can help make your computer easier to use.

Note: Depending on your keyboard, some of the following keyboard shortcuts might not be available.

• Windows logo key + U: Open Ease of Access Center

• Right Shift for eight seconds: Turn on or turn off Filter Keys

• Shift five times: Turn on or turn off Sticky Keys

• Num Lock for five seconds: Turn on or turn off Toggle Keys

• Left Alt+Left Shift+Num Lock: Turn on or turn off Mouse Keys

• Left Alt+Left Shift+PrtScn (or PrtSc): Turn on or turn off High Contrast

For more information, go to https://windows.microsoft.com, and then search using any of the following

keywords: keyboard shortcuts, key combinations, shortcut keys.

Ease of Access Center

Ease of Access Center on the Windows operating system enables you to configure your computers to suit

their physical and cognitive needs.

To access Ease of Access Center:

1. Go to Control Panel and view by Category.

2. Click Ease of Access ➙ Ease of Access Center.

3. Choose the appropriate tool by following the on-screen instructions.

Ease of Access Center mainly includes the following tools:

• Magnifier

Magnifier is a useful utility that enlarges the entire screen or part of the screen so that you can see the

items better.

• Narrator

Narrator is a screen reader that reads what is displayed on the screen aloud and describes events such as

error messages.

• On-Screen Keyboard

If you prefer to type or enter data into your computer using a mouse, joystick, or other pointing device

instead of a physical keyboard, you can use On-Screen Keyboard. On-Screen Keyboard displays a visual

keyboard with all the standard keys. You can select keys using the mouse or another pointing device, or

you can tap to select the keys if your computer supports multi-touch screen.

• High Contrast

High Contrast is a feature that heightens the color contrast of some text and images on your screen. As a

result, those items are more distinct and easier to identify.

• Personalized keyboard

Adjust keyboard settings to make your keyboard easier to use. For example, you can use your keyboard

to control the pointer and make the keyboard easier to type certain key combinations.

• Personalized mouse

Adjust mouse settings to make your mouse easier to use. For example, you can change the pointer

appearance and make your mouse easier to manage windows.

Speech Recognition

Speech Recognition enables you to control your computer by voice.

You can use verbal instructions to control the keyboard and mouse. With verbal instructions, you can start

programs, open menus, click objects on the screen, dictate text into documents, and write and send e-mails.

To use Speech Recognition:

1. Go to Control Panel and view by Category.

2. Click Ease of Access ➙ Speech Recognition.

3. Follow the on-screen instructions.

Screen-reader technologies

Screen-reader technologies are primarily focused on software program interfaces, help systems, and various

online documents. For additional information about screen readers, see the following:

• Use PDFs with screen readers:

https://www.adobe.com/accessibility.html?promoid=DJGVE

• Use the JAWS screen reader:

https://www.freedomscientific.com/Products/Blindness/JAWS

• Use the NVDA screen reader:

https://www.nvaccess.org/

Screen resolution

You can make the text and images on your screen easier to read by adjusting the screen resolution of your

computer.

To adjust the screen resolution:

1. Right-click an empty area of the desktop and then click Display settings ➙ Display.

2. Follow the on-screen instructions.

Note: Setting a resolution too low might prevent some items from fitting on the screen.

Customizable item size

You can make the items on your screen easier to read by changing the item size.

• To change the item size temporarily, use the Magnifier tool in Ease of Access Center.

• To change the item size permanently:

92 M75s-1 User Guide

– Change the size of all the items on your screen.

1. Right-click an empty area of the desktop and then click Display settings ➙ Display.

2. Change the item size by following the on-screen instructions. For some applications, your

configuration might not take effect until you sign out and then sign in again.

– Change the size of the items on a Web page.

Press and hold Ctrl, and then press the plus-sign key (+) to enlarge or the minus-sign key (–) to reduce

the text size.

– Change the size of the items on the desktop or a window.

Note: This function might not work on some windows.

If your mouse has a wheel, press and hold Ctrl, and then scroll the wheel to change the item size.

Industry-standard connectors

Your computer provides industry-standard connectors that enable you to connect assistive devices.

Documentation in accessible formats

Lenovo provides electronic documentation in accessible formats, such as properly tagged PDF files or

HyperText Markup Language (HTML) files. Lenovo electronic documentation is developed to ensure that

visually impaired users can read the documentation through a screen reader. Each image in the

documentation also includes adequate alternative text so that visually impaired users can understand the

image when they use a screen reader.

Ergonomic information

Good ergonomic practice is important to get the most from your personal computer and to avoid discomfort.

Arrange your workplace and the equipment you use to suit your individual needs and the kind of work that

you perform. In addition, use healthy work habits to maximize your performance and comfort when using

your computer.

Working in the virtual office might mean adapting to frequent changes in your environment. Adapting to the

surrounding light sources, active seating, and the placement of your computer hardware, can help you

improve your performance and achieve greater comfort.

This example shows someone in a conventional setting. Even when not in such a setting, you can follow

many of these tips. Develop good habits, and they will serve you well.

General posture: Make minor modifications in your working posture to deter the onset of discomfort caused

by long periods of working in the same position. Frequent short breaks from your work also help to prevent

minor discomfort associated with your working posture.

Appendix B. Accessibility and ergonomic information 93

Display: Position the display to maintain a comfortable viewing distance of 510 mm to 760 mm (20 inches to

30 inches). Avoid glare or reflections on the display from overhead lighting or outside sources of light. Keep

the display screen clean and set the brightness to levels that enable you to see the screen clearly. Press the

brightness control keys to adjust display brightness.

Head position: Keep your head and neck in a comfortable and neutral (vertical, or upright) position.

Chair: Use a chair that gives you good back support and seat height adjustment. Use chair adjustments to

best suit your comfort posture.

Arm and hand position: If available, use chair arm rests or an area on your working surface to provide

weight support for your arms. Keep your forearms, wrists, and hands in a relaxed and neutral (horizontal)

position. Type with a soft touch without pounding the keys.

Leg position: Keep your thighs parallel to the floor and your feet flat on the floor or on a footrest.

94 M75s-1 User Guide

Appendix C. Compliance information

This chapter provides regulatory, environmental, RoHS, and ENERGY STAR information about Lenovo

products.

Radio frequency compliance statements

Computer models equipped with wireless communications comply with the radio frequency and safety

standards of any country or region in which it has been approved for wireless use.

Besides this document, ensure that you read the Regulatory Notice for your country or region before using

the wireless devices contained in your computer.

Locate wireless regulatory notices

For more information about the wireless regulatory notices, refer to the Regulatory Notice at:

https://support.lenovo.com

European Union-compliance with the Radio Equipment Directive

• For computer models with wireless radio devices:

This product is in conformity with all the requirements and essential norms that apply to EU Council Radio

Equipment Directive 2014/53/EU on the approximation of the laws of the Member States relating to radio

equipment. The full text of the system EU declaration of conformity and the EU wireless module

declarations are available at:

https://www.lenovo.com/us/en/compliance/eu-doc

Lenovo cannot accept responsibility for any failure to satisfy the protection requirements resulting from a

non-recommended modification of the product, including the installation of option cards from other

manufacturers. This product has been tested and found to comply with the limits for Class B equipment

according to European Standards harmonized in the Directives in compliance. The limits for Class B

equipment were derived for typical residential environments to provide reasonable protection against

interference with licensed communication devices.

• For computer models without wireless radio devices:

The full text of the system EU declaration of conformity is available at:

https://www.lenovo.com/us/en/compliance/eu-doc

Lenovo cannot accept responsibility for any failure to satisfy the protection requirements resulting from a

non-recommended modification of the product, including the installation of option cards from other

manufacturers. This product has been tested and found to comply with the limits for Class B equipment

according to European Standards harmonized in the Directives in compliance. The limits for Class B

equipment were derived for typical residential environments to provide reasonable protection against

interference with licensed communication devices.

Brazil

Este equipamento não tem direito à proteção contra interferência prejudicial e não pode causar interferência

em sistemas devidamente autorizados.

This equipment is not protected against harmful interference and may not cause interference with duly

authorized systems.

Mexico

Advertencia: En Mexico la operación de este equipo está sujeta a las siguientes dos condiciones: (1) es

posible que este equipo o dispositivo no cause interferencia perjudicial y (2) este equipo o dispositivo debe

aceptar cualquier interferencia, incluyendo la que pueda causar su operación no deseada.

Singapore

Korea

무선설비 전파 혼신 (사용주파수 2400∼2483.5 , 5725∼5825 무선제품해당)

해당 무선설비가 전파혼신 가능성이 있으므로 인명안전과 관련된 서비스는 할 수 없음

SAR 정보

본 장치는 전파 노출에 대한 가이드라인을 충족합니다.

본 장치는 무선 송수신기 입니다. 본 장치는 국제 가이드라인으로 권장되는 전파 노출에 대한 제한을 초과하지

않도록 설계되었습니다. 장치 액세서리 및 최신 부품을 사용할 경우 SAR 값이 달라질 수 있 습니다. SAR 값은

국가 보고 및 테스트 요구 사항과 네트워크 대역에 따라 다를 수 있습니다. 본 장치 는 사람의 신체에서 20mm

이상의 거리에서 사용할 수 있습니다.

Environmental information of countries and regions

This section provides environmental, recycling, and RoHS information about Lenovo products.

Recycling and environmental information

Lenovo encourages owners of information technology (IT) equipment to responsibly recycle their equipment

when it is no longer needed. Lenovo offers a variety of programs and services to assist equipment owners in

recycling their IT products. For information about recycling Lenovo products, go to:

https://www.lenovo.com/us/en/compliance/recycling

The latest environmental information about our products is available at:

https://www.lenovo.com/us/en/compliance/eco-declaration

Important WEEE information

The WEEE marking on Lenovo products applies to countries with WEEE and e-waste regulations (for

example, the European WEEE Directive, India E-Waste Management Rules). Appliances are labeled in

accordance with local regulations concerning waste electrical and electronic equipment (WEEE). These

regulations determine the framework for the return and recycling of used appliances as applicable within

96 M75s-1 User Guide

each geography. This label is applied to various products to indicate that the product is not to be thrown

away, but rather put in the established collection systems for reclaiming these end of life products.

Users of electrical and electronic equipment (EEE) with the WEEE marking must not dispose of end of life

EEE as unsorted municipal waste, but use the collection framework available to them for the return, recycle,

and recovery of WEEE and to minimize any potential effects of EEE on the environment and human health

due to the presence of hazardous substances. Lenovo electrical and electronic equipment (EEE) may contain

parts and components, which at end-of-life might qualify as hazardous waste.

EEE and waste electrical and electronic equipment (WEEE) can be delivered free of charge to the place of

sale or any distributor that sells electrical and electronic equipment of the same nature and function as the

used EEE or WEEE.

For additional WEEE information, go to:

https://www.lenovo.com/us/en/compliance/recycling

WEEE information for Hungary

Lenovo, as a producer, bears the cost incurred in connection with the fulfillment of Lenovo’s obligations

under Hungary Law No. 197/2014 (VIII.1.) subsections (1)-(5) of section 12.

Japan recycling statements

Collect and recycle a disused Lenovo computer or monitor

If you are a company employee and need to dispose of a Lenovo computer or monitor that is the property of

the company, you must do so in accordance with the Law for Promotion of Effective Utilization of Resources.

Computers and monitors are categorized as industrial waste and should be properly disposed of by an

industrial waste disposal contractor certified by a local government. In accordance with the Law for

Promotion of Effective Utilization of Resources, Lenovo Japan provides, through its PC Collecting and

Recycling Services, for the collecting, reuse, and recycling of disused computers and monitors. For details,

visit the Lenovo Web site at:

https://www.lenovo.com/us/en/social_responsibility/sustainability/ptb_japan

Pursuant to the Law for Promotion of Effective Utilization of Resources, the collecting and recycling of home-

used computers and monitors by the manufacturer was begun on October 1, 2003. This service is provided

free of charge for home-used computers sold after October 1, 2003. For details, go to:

https://www.lenovo.com/us/en/social_responsibility/sustainability/ptb_japan

Dispose of Lenovo computer components

Some Lenovo computer products sold in Japan may have components that contain heavy metals or other

environmental sensitive substances. To properly dispose of disused components, such as a printed circuit

board or drive, use the methods described above for collecting and recycling a disused computer or monitor.

Dispose of disused lithium batteries from Lenovo computers

A button-shaped lithium battery is installed inside your Lenovo computer to provide power to the computer

clock while the computer is off or disconnected from the main power source. If you need to replace it with a

new one, contact your place of purchase or contact Lenovo for service. If you need to dispose of a disused

lithium battery, insulate it with vinyl tape, contact your place of purchase or an industrial-waste-disposal

operator, and follow their instructions.

Disposal of a lithium battery must comply with local ordinances and regulations.

Appendix C. Compliance information 97

Brazil recycling information

Declarações de Reciclagem no Brasil

Descarte de um Produto Lenovo Fora de Uso

Equipamentos elétricos e eletrônicos não devem ser descartados em lixo comum, mas enviados à pontos de

coleta, autorizados pelo fabricante do produto para que sejam encaminhados e processados por empresas

especializadas no manuseio de resíduos industriais, devidamente certificadas pelos orgãos ambientais, de

acordo com a legislação local.

A Lenovo possui um canal específico para auxiliá-lo no descarte desses produtos. Caso você possua um

produto Lenovo em situação de descarte, ligue para o nosso SAC ou encaminhe um e-mail para:

reciclar@lenovo.com, informando o modelo, número de série e cidade, a fim de enviarmos as instruções

para o correto descarte do seu produto Lenovo.

Battery recycling information for the European Union

Notice: This mark applies only to countries within the European Union (EU).

Batteries or packaging for batteries are labeled in accordance with European Directive 2006/66/EC

concerning batteries and accumulators and waste batteries and accumulators. The Directive determines the

framework for the return and recycling of used batteries and accumulators as applicable throughout the

European Union. This label is applied to various batteries to indicate that the battery is not to be thrown

away, but rather reclaimed upon end of life per this Directive.

In accordance with the European Directive 2006/66/EC, batteries and accumulators are labeled to indicate

that they are to be collected separately and recycled at end of life. The label on the battery may also include

a chemical symbol for the metal concerned in the battery (Pb for lead, Hg for mercury, and Cd for cadmium).

Users of batteries and accumulators must not dispose of batteries and accumulators as unsorted municipal

waste, but use the collection framework available to customers for the return, recycling, and treatment of

batteries and accumulators. Customer participation is important to minimize any potential effects of batteries

and accumulators on the environment and human health due to the potential presence of hazardous

substances.

Before placing electrical and electronic equipment (EEE) in the waste collection stream or in waste collection

facilities, the end user of equipment containing batteries and/or accumulators must remove those batteries

and accumulators for separate collection.

Disposing of lithium batteries and battery packs from Lenovo products

A coin-cell type lithium battery might be installed inside your Lenovo product. You can find details about the

battery in the product documentation. If the battery needs to be replaced, contact your place of purchase or

contact Lenovo for service. If you need to dispose of a lithium battery, insulate it with vinyl tape, contact your

place of purchase or a waste-disposal operator, and follow their instructions.

98 M75s-1 User Guide

Disposing of battery packs from Lenovo products

Your Lenovo device might contain a lithium-ion battery pack or a nickel metal hydride battery pack. You can

find details on the battery pack in the product documentation. If you need to dispose of a battery pack,

insulate it with vinyl tape, contact Lenovo sales, service, or your place of purchase, or a waste-disposal

operator, and follow their instructions. You also can refer to the instructions provided in the user guide for

your product.

For proper collection and treatment, go to:

https://www.lenovo.com/lenovo/environment

Recycling information for mainland China

Battery recycling information for Taiwan

Restriction of Hazardous Substances (RoHS) Directive of countries and

regions

The latest environmental information about Lenovo products is available at:

https://www.lenovo.com/us/en/compliance/eco-declaration

European Union RoHS

This Lenovo product, with included parts (cables, cords, and so on) meets the requirements of Directive

2011/65/EU on the restriction of the use of certain hazardous substances in electrical and electronic

equipment ("RoHS recast" or "RoHS 2").

For more information about Lenovo worldwide compliance on RoHS, go to:

https://www.lenovo.com/rohs-communication

Turkish RoHS

The Lenovo product meets the requirements of the Republic of Turkey Directive on the Restriction of the Use

of Certain Hazardous Substances in Waste Electrical and Electronic Equipment (WEEE).

Appendix C. Compliance information 99

Ukraine RoHS

India RoHS

RoHS compliant as per E-Waste (Management) Rules.

Mainland China RoHS

100 M75s-1 User Guide

Taiwan RoHS

Electromagnetic emission notices

Federal Communications Commission (FCC) Supplier’s Declaration of

Conformity

The following information refers to ThinkCentre M75s-1, machine types: 11A9, 11AA, 11AV, and 11AW.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to

Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful

Appendix C. Compliance information 101

interference in a residential installation. This equipment generates, uses, and can radiate radio frequency

energy and, if not installed and used in accordance with the instructions, may cause harmful interference to

radio communications. However, there is no guarantee that interference will not occur in a particular

installation. If this equipment does cause harmful interference to radio or television reception, which can be

determined by turning the equipment off and on, the user is encouraged to try to correct the interference by

one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult an authorized dealer or service representative for help.

Lenovo is not responsible for any radio or television interference caused by using other than recommended

cables and connectors or by unauthorized changes or modifications to this equipment. Unauthorized

changes or modifications could void the user’s authority to operate the equipment.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1)

this device may not cause harmful interference, and (2) this device must accept any interference received,

including interference that may cause undesired operation.

Responsible Party:

Lenovo (United States) Incorporated

7001 Development Drive

Morrisville, NC 27560

Email: FCC@lenovo.com

Industry Canada compliance statement

CAN ICES-3(B)/NMB-3(B)

European Union conformity

EU Contact: Lenovo (Slovakia), Landererova 12, 811 09 Bratislava, Slovakia

Compliance with the EMC Directive

This product is in conformity with the protection requirements of EU Council Directive 2014/30/EU on the

approximation of the laws of the Member States relating to electromagnetic compatibility.

This product has been tested and found to comply with the limits for Class B equipment according to

European Standards harmonized in the Directives in compliance. The Class B requirements for equipment

are intended to offer adequate protection to broadcast services within residential environments.

German Class B compliance statement

Hinweis zur Einhaltung der Klasse B zur elektromagnetischen Verträglichkeit

Dieses Produkt entspricht den Schutzanforderungen der EU-Richtlinie zur elektromagnetischen

Verträglichkeit Angleichung der Rechtsvorschriften über die elektromagnetische Verträglichkeit in den EU-

Mitgliedsstaaten und hält die Grenzwerte der Klasse B der Norm gemäß Richtlinie.

102 M75s-1 User Guide

Um dieses sicherzustellen, sind die Geräte wie in den Handbüchern beschrieben zu installieren und zu

betreiben. Des Weiteren dürfen auch nur von der Lenovo empfohlene Kabel angeschlossen werden. Lenovo

übernimmt keine Verantwortung für die Einhaltung der Schutzanforderungen, wenn das Produkt ohne

Zustimmung der Lenovo verändert bzw. wenn Erweiterungskomponenten von Fremdherstellern ohne

Empfehlung der Lenovo gesteckt/eingebaut werden.

Zulassungsbescheinigung laut dem Deutschen Gesetz über die elektromagnetische Verträglichkeit von

Betriebsmitteln, EMVG vom 20. Juli 2007 (früher Gesetz über die elektromagnetische Verträglichkeit von

Geräten), bzw. der EU Richtlinie 2014/30/EU, der EU Richtlinie 2014/53/EU Artikel 3.1b), für Geräte der

Klasse B.

Dieses Gerät ist berechtigt, in Übereinstimmung mit dem Deutschen EMVG das EG-Konformitätszeichen -

CE - zu führen. Verantwortlich für die Konformitätserklärung nach Paragraf 5 des EMVG ist die Lenovo

(Deutschland) GmbH, Meitnerstr. 9, D-70563 Stuttgart.

Japan VCCI Class B compliance statement

Japan compliance statement for products which connect to the power

mains with rated current less than or equal to 20 A per phase

Japan notice for ac power cord

The ac power cord shipped with your product can be used only for this specific product. Do not use the ac

power cord for other devices.

Other compliance information of countries and regions

This section provides other compliance information about Lenovo products.

Certification-related information

Product name: ThinkCentre M75s-1

Machine types: 11A9, 11AA, 11AV, and 11AW.

The latest compliance information is available at:

https://www.lenovo.com/compliance

TCO Certified

Selected models are TCO Certified and bear the TCO Certified logo.

Note: TCO Certified is an international third-party sustainability certification for IT products. For details, go

to https://www.lenovo.com/us/en/compliance/tco.

Appendix C. Compliance information 103

Export classification notice

This product is subject to the United States Export Administration Regulations (EAR) and has an Export

Classification Control Number (ECCN) of 5A992.c. It can be re-exported except to any of the embargoed

countries in the EAR E1 country list.

Lenovo product service information for Taiwan

Taiwan precautionary vision statement

警語：使用過度恐傷害視力

注意事項：

• 使用30分鐘請休息10分鐘。

• 未滿2歲幼兒不看螢幕，2歲以上每天看螢幕不要超過1小時。

Keyboard and mouse compliance statement for Taiwan

Eurasian compliance mark

Brazil audio notice

Ouvir sons com mais de 85 decibéis por longos períodos pode provocar danos ao sistema auditivo.

ENERGY STAR model information

ENERGY STAR is a joint program of the U.S. Environmental Protection Agency and the U.S. Department of

Energy aimed at saving money and protecting the environment through energy efficient products and

practices.

Lenovo is proud to offer products with the ENERGY STAR certified designation. Lenovo computers, if carry

an ENERGY STAR mark, have been designed and tested to conform to the ENERGY STAR program

requirements for computers as prescribed by the U.S. Environmental Protection Agency. For a certified

computer, an ENERGY STAR mark may be affixed to the product, the product packaging, or displayed

electronically on the E-label screen or the power settings interface.

By using ENERGY STAR compliant products and taking advantage of the power management features of

your computer, you reduce the consumption of electricity. Reduced electrical consumption contributes to

104 M75s-1 User Guide

potential financial savings, a cleaner environment, and the reduction of greenhouse gas emissions. For more

information about ENERGY STAR, go to https://www.energystar.gov.

Lenovo encourages you to make efficient use of energy an integral part of your day-to-day operations. To

help in this endeavor, Lenovo has preset a default power plan. To change the power plan, see “Set the power

plan” on page 13.

Appendix C. Compliance information 105

106 M75s-1 User Guide

Appendix D. Notices and trademarks

Notices

Lenovo may not offer the products, services, or features discussed in this document in all countries. Consult

your local Lenovo representative for information on the products and services currently available in your

area. Any reference to a Lenovo product, program, or service is not intended to state or imply that only that

Lenovo product, program, or service may be used. Any functionally equivalent product, program, or service

that does not infringe any Lenovo intellectual property right may be used instead. However, it is the user's

responsibility to evaluate and verify the operation of any other product, program, or service.

Lenovo may have patents or pending patent programs covering subject matter described in this document.

The furnishing of this document does not give you any license to these patents. You can send license

inquiries, in writing, to:

Lenovo (United States), Inc.

1009 Think Place - Building One

Morrisville, NC 27560

U.S.A.

Attention: Lenovo Director of Licensing

LENOVO PROVIDES THIS PUBLICATION "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS

OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF NON-INFRINGEMENT,

MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some jurisdictions do not allow

disclaimer of express or implied warranties in certain transactions, therefore, this statement may not apply to

you.

Changes are made periodically to the information herein; these changes will be incorporated in new editions

of the publication. To provide better service, Lenovo reserves the right to improve and/or modify the

products and software programs described in the manuals included with your computer, and the content of

the manual, at any time without additional notice.

The software interface and function and hardware configuration described in the manuals included with your

computer might not match exactly the actual configuration of the computer that you purchase. For the

configuration of the product, refer to the related contract (if any) or product packing list, or consult the

distributor for the product sales. Lenovo may use or distribute any of the information you supply in any way it

believes appropriate without incurring any obligation to you.

The products described in this document are not intended for use in implantation or other life support

applications where malfunction may result in injury or death to persons. The information contained in this

document does not affect or change Lenovo product specifications or warranties. Nothing in this document

shall operate as an express or implied license or indemnity under the intellectual property rights of Lenovo or

third parties. All information contained in this document was obtained in specific environments and is

presented as an illustration. The result obtained in other operating environments may vary.

Lenovo may use or distribute any of the information you supply in any way it believes appropriate without

incurring any obligation to you.

Any references in this publication to non-Lenovo Web sites are provided for convenience only and do not in

any manner serve as an endorsement of those Web sites. The materials at those Web sites are not part of the

materials for this Lenovo product, and use of those Web sites is at your own risk.

Any performance data contained herein was determined in a controlled environment. Therefore, the result

obtained in other operating environments may vary significantly. Some measurements may have been made

on development-level systems and there is no guarantee that these measurements will be the same on

generally available systems. Furthermore, some measurements may have been estimated through

extrapolation. Actual results may vary. Users of this document should verify the applicable data for their

specific environment.

This document is copyrighted by Lenovo and is not covered by any open source license, including any Linux

agreement(s) which may accompany software included with this product. Lenovo may update this document

at any time without notice.

For the latest information or any questions or comments, contact or visit the Lenovo Web site:

https://support.lenovo.com

Trademarks

LENOVO, LENOVO logo, THINKCENTRE, and THINKCENTRE logo are trademarks of Lenovo. Intel, and

Optane are trademarks of Intel Corporation or its subsidiaries in the U.S. and/or other countries. Microsoft,

Windows, and Cortana are trademarks of the Microsoft group of companies. DisplayPort is a trademark of

the Video Electronics Standards Association. Wi-Fi is a registered trademark of Wi-Fi Alliance. USB-C is a

2019 Lenovo.

108 M75s-1 User Guide

Table of Contents

Lenovo M75s SFF User Manual

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