Chapter 1. About this manual
- Important Safety Information
Chapter 2. Safety information
Chapter 3. General information
- Specifications
Chapter 4. General Checkout
Chapter 5. Using the Setup Utility
Chapter 6. Symptom-to-FRU Index
Chapter 7. Locating connectors, controls and components
Chapter 8. Replacing hardware
Chapter 9. General information
- Additional Service Information

Lenovo ideacentre AIO 520-24ARR User Manual

Displayed below is the user manual for ideacentre AIO 520-24ARR by Lenovo which is a product in the All-in-One PCs/Workstations category. This manual has pages.

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ideacentre All-In-One 520 (22 & 24 inch)

Computer Hardware Maintenance Manual

Machine Types:F0D1 [AIO 520-24 IKL/Energy Star] F0D2 [AIO 520-

24IKU/Energy Star] / F0D3 [AIO 520-24AST/Energy Star] F0D4 [AIO

520-22 IKL/Energy Star] / F0D5 [AIO 520-22IKU/Energy Star] F0D6

[AIO 520-22AST/Energy Star] /F0DJ [AIO 520-24ICB /Energy Star] /

F0DN [AIO 520-24ARR /Energy Star] F0DT [AIO 520-22ICB /Energy

Star]

ideacentre All-In-One 520 (22 & 24 inch)

Computer Hardware Maintenance Manual

Machine Types:F0D1 [AIO 520-24 IKL/Energy Star] F0D2 [AIO 520-

24IKU/Energy Star] / F0D3 [AIO 520-24AST/Energy Star] F0D4 [AIO

520-22 IKL/Energy Star] / F0D5 [AIO 520-22IKU/Energy Star] F0D6

[AIO 520-22AST/Energy Star] /F0DJ [AIO 520-24ICB /Energy Star] /

F0DN [AIO 520-24ARR /Energy Star] F0DT [AIO 520-22ICB /Energy

Star]

First Edition (May 2018)

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

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

35F-05925

Contents

Chapter 1. About this manual . . . . . . 1

Important Safety Information. . . . . . . . . . . 1

Chapter 2. Safety information . . . . . . 3

General safety . . . . . . . . . . . . . . . . 3

Electrical safety . . . . . . . . . . . . . . . . 3

Safety inspection guide . . . . . . . . . . . . . 5

Handling electrostatic discharge-sensitive

devices . . . . . . . . . . . . . . . . . . . 5

Grounding requirements . . . . . . . . . . . . 6

Safety notices . . . . . . . . . . . . . . . . 6

Chapter 3. General information . . . . . 9

Specifications . . . . . . . . . . . . . . . . 9

Chapter 4. General Checkout . . . . . 11

Chapter 5. Using the Setup Utility. . . 13

Starting the Lenovo BIOS Setup Utility program . . 13

Viewing and changing settings . . . . . . . . . 13

Using passwords . . . . . . . . . . . . . . 13

Enabling or disabling a device . . . . . . . . . 15

Selecting a startup device . . . . . . . . . . . 16

Exiting the Lenovo BIOS Setup Utility program. . . 17

Chapter 6. Symptom-to-FRU

Index . . . . . . . . . . . . . . . . . . 19

Hard disk drive boot error . . . . . . . . . . . 19

Power Supply Problems . . . . . . . . . . . 19

POST error codes . . . . . . . . . . . . . . 20

Undetermined problems . . . . . . . . . . . 20

Chapter 7. Locating connectors,

controls and components . . . . . . . 21

Chapter 8. Replacing hardware . . . . 35

General information . . . . . . . . . . . . . 35

Replacing the keyboard and mouse . . . . . . . 36

Replacing the adapter . . . . . . . . . . . . 36

Removing the stand base . . . . . . . . . . . 36

Removing the rear cover . . . . . . . . . . . 37

Replacing the camera . . . . . . . . . . . . 40

Replacing the heat-sink. . . . . . . . . . . . 41

Replacing the CPU . . . . . . . . . . . . . 42

Replacing the hard disk drive . . . . . . . . . 44

Replacing the system fan . . . . . . . . . . . 45

Replacing the optical drive . . . . . . . . . . 46

Replacing the memory module . . . . . . . . . 48

Replacing the solid state drive . . . . . . . . . 49

Replacing the Wi-Fi card . . . . . . . . . . . 50

Replacing the side USB board . . . . . . . . . 51

Replacing the motherboard . . . . . . . . . . 52

Removing the stand holder . . . . . . . . . . 54

Replacing the Microphone module . . . . . . . 54

Replacing the speaker system . . . . . . . . . 55

Replacing the LCD panel module . . . . . . . . 56

Chapter 9. General information . . . . 61

Additional Service Information . . . . . . . . . 61

iv ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Chapter 1. About this manual

This manual contains service and reference information for Lenovo All-In-One 520 series computers listed on

the cover. It is intended only for trained servicers who are familiar with Lenovo computer products.

Before servicing a Lenovo product, be sure to read the Safety Information.

The description of the TV-tuner card in this manual applies only to computers with a TV-tuner card installed.

It does not apply to computers without a TV-tuner card.

Important Safety Information

Be sure to read all CAUTION and DANGER sections in this manual before following any of the instructions.

Veuillez lire toutes les consignes de type DANGER et ATTENTION du présent document avant d’exécuter les

instructions.

Lesen Sie unbedingt alle Hinweise vom Typ “ACHTUNG” oder “VORSICHT” in dieser Dokumentation, bevor

Sie irgendwelche Vorgänge durchführen

Leggere le istruzioni introdotte da ATTENZIONE e PERICOLO presenti nel manuale prima di eseguire una

qualsiasi delle istruzioni

Certifique-se de ler todas as instruções de cuidado e perigo neste manual antes de executar qualquer uma

das instruções

Es importante que lea todas las declaraciones de precaución y de peligro de este manual antes de seguir las

instrucciones.

2ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Chapter 2. Safety information

This chapter contains the safety information that you need to be familiar with before servicing a computer.

General safety

Follow these rules to ensure general safety:

• Keep the areas around the computer clear and clean during and after maintenance.

• When lifting any heavy object:

1. Ensure you can stand safely without slipping.

2. Distribute the weight of the object equally across both feet.

3. Lift slowly. Never move suddenly or twist when you attempt to lift.

4. Lift by standing or by pushing up with your leg muscles; this action removes the strain from the

muscles in your back.

Do not attempt to lift any objects that weigh more than 16 kg (35 lb) or objects that you think are too

heavy for you.

• Do not perform any action that would create a hazard for the customer, or would make the computer

unsafe.

• Before you start the computer, ensure that other service representatives and customer personnel are not

in a position that would create a hazard for them.

• Place removed covers and other parts in a safe place, away from all personnel, while you are servicing the

computer.

• Keep your tool case away from areas that people may walk through to ensure no-one trips over it.

• Do not wear loose clothing that can be trapped in the moving parts of a machine. Ensure that your sleeves

are fastened or rolled up above your elbows. If your hair is long, tie or fasten it back.

• Insert the ends of your necktie or scarf inside clothing or fasten it with a non-conductive clip,

approximately 8 centimeters (3 inches) from the end.

• Do not wear jewelry, chains, metal-frame eyeglasses, or metal fasteners for your clothing.

Remember: Metal objects are good electrical conductors.

• Wear safety glasses when you are: hammering, drilling soldering, cutting wire, attaching springs, using

solvents, or working in any other conditions that might be hazardous to your eyes.

• After service, reinstall all safety shields, guards, labels, and ground wires. Replace any safety device that

is worn or defective.

• Reattach all covers correctly before returning the computer to the customer.

Electrical safety

CAUTION:

Electrical current from power, telephone, and communication cables can be hazardous. To avoid

personal injury or equipment damage, disconnect any attached power cords, telecommunication

cables, network cables, and modem cables before you open the computer covers, unless instructed

otherwise in the installation and configuration procedures.

Observe the following rules when working on electrical equipment.

Important: Use only approved tools and test equipment. Some hand tools have handles covered with a soft

material that does not insulate you when working with live electrical currents. Many customers have rubber

floor mats near their equipment that contain small conductive fibers to decrease electrostatic discharge.

• Find the room emergency power-off (EPO) switch, disconnecting switch, or electrical outlet. If an electrical

accident occurs, you can then operate the switch or unplug the power cord quickly.

• Do not work alone under hazardous conditions or near equipment that has hazardous voltages.

• Disconnect all power before:

– Performing a mechanical inspection

– Working near power supplies

– Removing or installing Field Replaceable Units (FRUs)

• Before you start to work on the computer, unplug the power cord. If you cannot unplug it, ask the

customer to power-off the electrical outlet that supplies power to the machine and to lock the electrical

outlet in the off position.

• If you need to work on a computer that has exposed electrical circuits, observe the following precautions:

– Ensure that another person, familiar with the power-off controls, is near you.

Remember: Another person must be there to switch off the power, if necessary.

– Use only one hand when working with powered-on electrical equipment; keep the other hand in your

pocket or behind your back.

Remember: There must be a complete circuit to cause electrical shock. By observing the above rule,

you may prevent a current from passing through your body.

– When using a tester, set the controls correctly and use the approved probe leads and accessories for

that tester.

– Stand on suitable rubber mats (obtained locally, if necessary) to insulate you from grounds such as

metal floor strips and machine frames.

Observe the special safety precautions when you work with very high voltages; these instructions are in

the safety sections of the maintenance information. Use extreme care when measuring high voltages.

• Regularly inspect and maintain your electrical hand tools to ensure they are safe to use.

• Do not use worn or broken tools and testers.

• Never assume that power has been disconnected from a circuit. First, check that it has been powered off.

• Always look carefully for possible hazards in your work area. Examples of these hazards are wet floors,

non-grounded power extension cables, conditions that may cause or allow power surges, and missing

safety grounds.

• Do not touch live electrical circuits with the reflective surface of a plastic dental mirror. This surface is

conductive, and touching a live circuit can cause personal injury and damage to the computer.

• Do not service the following parts with the power on when they are removed from their normal operating

positions in a computer:

– Power supply units

– Pumps

– Blowers and fans

– Motor generators

and similar units. (This practice ensures correct grounding of the units.)

4ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

• If an electrical accident occurs:

– Use caution; do not become a victim yourself.

– Switch off power.

– Send another person to get medical aid.

Safety inspection guide

The intent of this inspection guide is to assist you in identifying potential hazards posed by these products.

Each computer, as it was designed and built, had required safety items installed to protect users and service

personnel from injury. This guide addresses only those items. However, good judgment should be used to

identify potential safety hazards due to attachment of features or options not covered by this inspection

guide.

If any hazards are present, you must determine how serious the apparent hazard could be and whether you

can continue without first resolving the problem.

Consider the following items and the safety hazards they present:

• Electrical hazards, especially primary power (primary voltage on the frame can cause serious or fatal

electrical shock).

• Explosive hazards, such as a damaged CRT face or bulging capacitor

• Mechanical hazards, such as loose or missing hardware

The guide consists of a series of steps presented as a checklist. Begin the checks with the power off, and the

power cord disconnected.

Checklist:

1. Check exterior covers for damage (loose, broken, or sharp edges).

2. Power-off the computer. Disconnect the power cord.

3. Check the power cord for:

a. A third-wire ground connector in good condition. Use a meter to measure third-wire ground

continuity for 0.1 ohm or less between the external ground pin and frame ground.

b. The power cord should be the appropriate type as specified in the parts listings.

c. Insulation must not be frayed or worn.

4. Remove the cover.

5. Check for any obvious alterations. Use good judgment as to the safety of any alterations.

6. Check inside the unit for any obvious hazards, such as metal filings, contamination, water or other

liquids, or signs of fire or smoke damage.

7. Check for worn, frayed, or pinched cables.

8. Check that the power-supply cover fasteners (screws or rivets) have not been removed or tampered

with.

Handling electrostatic discharge-sensitive devices

Any computer part containing transistors or integrated circuits (ICs) should be considered sensitive to

electrostatic discharge (ESD). ESD damage can occur when there is a difference in charge between objects.

Protect against ESD damage by equalizing the charge so that the computer, the part, the work mat, and the

person handling the part are all at the same charge.

Notes:

Chapter 2.Safety information 5

1. Use product-specific ESD procedures when they exceed the requirements noted here.

2. Make sure that the ESD protective devices you use have been certified (ISO 9000) as fully effective.

When handling ESD-sensitive parts:

• Keep the parts in protective packages until they are inserted into the product.

• Avoid contact with other people while handling the part.

• Wear a grounded wrist strap against your skin to eliminate static on your body.

• Prevent the part from touching your clothing. Most clothing is insulative and retains a charge even when

you are wearing a wrist strap.

• Use the black side of a grounded work mat to provide a static-free work surface. The mat is especially

useful when handling ESD-sensitive devices.

• Select a grounding system, such as those listed below, to provide protection that meets the specific

service requirement.

Note: The use of a grounding system is desirable but not required to protect against ESD damage.

– Attach the ESD ground clip to any frame ground, ground braid, or green-wire ground.

– Use an ESD common ground or reference point when working on a double-insulated or battery-

operated system. You can use coax or connector-outside shells on these systems.

– Use the round ground-prong of the AC plug on AC-operated computers.

Grounding requirements

Electrical grounding of the computer is required for operator safety and correct system function. Proper

grounding of the electrical outlet can be verified by a certified electrician.

Safety notices

The CAUTION and DANGER safety notices in this section are provided in the language of English.

DANGER

Electrical current from power, telephone and communication cables is hazardous.

To avoid a shock hazard:

• 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 any equipment that will be attached to this product to a properly wired outlet.

• When 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, telecommunications cables, network cables, and modem

cables before you open the device covers, unless instructed otherwise in the installation and

configuration procedures.

6ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

• Connect and disconnect cables as described in the following table when installing, moving, or

opening covers on this product or attached devices.

To Connect To Disconnect

1. Turn everything OFF.

2. First, attach all cables to devices.

3. Attach signal cables to connectors.

4. Attach power cords to outlet.

5. Turn device ON.

1. Turn everything OFF.

2. First, remove power cords from outlets.

3. Remove signal cables from connectors.

4. Remove all cables from devices.

CAUTION:

When replacing the lithium battery, use only Part Number 45C1566 or an equivalent type battery

recommended by the manufacturer. If your system has a module containing a lithium battery, replace

it only with the same module type made by the same manufacturer. The battery contains lithium and

can explode if not properly used, handled, or disposed of.

Do not:

• Throw into or immerse in water

• Heat to more than 100°C (212°F)

• Repair or disassemble

Dispose of the battery as required by local ordinances or regulations.

CAUTION:

When laser products (such as CD-ROMs, DVD-ROM 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 3A or Class 3B laser diode. Note the following:

These diodes emit radiation when open. Do not stare into the beam, do not view directly with optical

instruments, and avoid direct exposure to the beam.

Chapter 2.Safety information 7

≥18 kg (37 lbs) ≥32 kg (70.5 lbs) ≥55 kg (121.2 lbs)

CAUTION:

Use safe practices when lifting.

CAUTION:

The power control button on the device and the power switch on the power supply do not turn off the

electrical current supplied to the device. The device also might have more than one power cord. To

remove all electrical current from the device, ensure that all power cords are disconnected from the

power source.

CAUTION:

Do not place any object weighing more than 82 kg (180 lbs.) on top of rack-mounted devices.

8ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Chapter 3. General information

This chapter provides general information that applies to all computer models covered by this manual.

Specifications

This section lists the physical specifications for your computer.

Type Lenovo All-In-One 520

This section lists the physical specifications.

Environment

Air temperature:

Operating: 10° to 35°C

Transit: -20° to 55°C

Humidity:

Operating: 35% to 80%

Transit: 20% to 90% (40°C)

Altitude: 86KPa to 106KPa

Electrical input:

Input voltage: 90V-264V(AC)

Input frequency: 47Hz-63Hz

10 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Chapter 4. General Checkout

Attention: The drives in the computer you are servicing might have been rearranged or the drive startup

sequence may have been changed. Be extremely careful during write operations such as copying, saving, or

formatting. Data or programs can be overwritten if you select an incorrect drive.

General error messages appear if a problem or conflict is found by an application, the operating system, or

both. For an explanation of these messages, refer to the information supplied with that software package.

Use the following procedure to help determine the cause of the problem:

1. Power-off the computer and all external devices.

2. Check all cables and power cords.

3. Set all display controls to the middle position.

4. Power-on all external devices.

5. Power-on the computer.

• Look for displayed error codes.

• Look for readable instructions or a main menu on the display.

If you did not receive the correct response, proceed to step 6.

If you did receive the correct response, proceed to step 7.

6. If one of the following happens, follow the instruction given:

• If the computer displays a POST error, go to “POST error codes”.

• If the computer hangs and no error is displayed, continue at step 7.

7. If the test stops and you cannot continue, replace the last device tested.

12 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Chapter 5. Using the Setup Utility

The Setup Utility program is used to view and change the configuration settings of your computer, regardless

of which operating system you are using. However, the operating system settings might override any similar

settings in the Setup Utility program.

Starting the Lenovo BIOS Setup Utility program

To start the Lenovo BIOS Setup Utility program, do the following:

1. If your computer is already on when you start this procedure, shut down the operating system and turn

off the computer.

2. Press and hold the F1 key then turn on the computer. When the Lenovo BIOS Setup Utility program is

displayed, release the F1 key.

Note: If a Power-On Password or an Administrator Password has been set, the Setup Utility program menu

will not be displayed until you type your password. For more information, see “Using passwords.”

Viewing and changing settings

System configuration options are listed in the Lenovo BIOS Setup Utility program menu. To view or change

settings, see “Starting the Setup Utility program.”

You must use the keyboard when using the Lenovo BIOS Setup Utility menu. The keys used to perform

various tasks are displayed on the bottom of each screen.

Using passwords

You can use the Lenovo BIOS Setup Utility program to set passwords to prevent unauthorized persons from

gaining access to your computer and data. See “Starting the Setup Utility program.” The following types of

passwords are available:

• Administrator Password

• Power-On Password

You do not have to set any passwords to use your computer. However, if you decide to set passwords, read

the following sections.

Password considerations

A password can be any combination of letters and numbers up to 16 characters (a-z and 0-9). For security

reasons, it is a good idea to use a strong password that cannot be easily compromised. We suggest that

passwords should follow these rules:

• For a strong password, use 7-16 characters and a mix of letters and numbers.

• Do not use your name or your user name.

• Do not use a common word or a common name.

• Use something significantly different from your previous password.

Attention: Administrator and Power-On passwords are not case sensitive.

Administrator Password

Setting an Administrator Password deters unauthorized persons from changing configuration settings. You

might want to set an Administrator Password if you are responsible for maintaining the settings of several

computers.

After you set an Administrator Password, a password prompt is displayed every time you access the Lenovo

BIOS Setup Utility program.

If both the Administrator and Power-On Password are set, you can type either password. However, you must

use your Administrator Password to change any configuration settings.

Setting, changing, or deleting an Administrator password

To set an Administrator Password, do the following:

Note: A password can be any combination of letters and numbers up to 16 characters (a-z and 0-9). For

more information, see “Password considerations” on page 13.

1. Start the Lenovo BIOS Setup Utility program (see “Starting the Lenovo BIOS Setup Utility program” on

page 13).

2. From the Security menu, select Set Administrator Password and press the Enter key.

3. The password dialog box will be displayed. Type the password then press the Enter key.

4. Re-type the password to confirm, then press the Enter key. If you typed the password correctly, the

password will be installed.

To change an Administrator Password, do the following:

1. Start the Lenovo BIOS Setup Utility program (see “Starting the Lenovo BIOS Setup Utility program” on

page 13).

2. From the Security menu, select Set Administrator Password and press the Enter key.

3. The password dialog box will be displayed. Type the current password then press the Enter key.

4. Type the new password, then press the Enter key. Re-type the password to confirm the new password.

If you typed the new password correctly, the new password will be installed. A Setup Noticed confirming

that changes have been saved will be displayed.

To delete a previously set Administrator Password, do the following :

1. From the Security menu, select Set Administrator Password and press the Enter key.

2. The password dialog box will be displayed. Type the current password and press the Enter key.

3. To delete an Administrator Password, leave each new password line item blank, then press the Enter

key. A Setup Notice confirming that changes have been saved will be displayed.

4. Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.

5. Select Save changes and Exit from the menu.

Power-On Password

When a Power-On Password is set, you cannot start the Lenovo BIOS Setup Utility program until a valid

password is typed from the keyboard.

Setting, changing, or deleting a Power-On Password

14 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Note: A password can be any combination of letters and numbers up to 16 characters (a-z and 0-9).

To set a Power-On Password, do the following:

1. Start the Lenovo BIOS Setup Utility program (See ”Starting the Lenovo BIOS Setup Utility program” on

page 13.)

2. From the Security menu, select Set Power-On Password and press the Enter key.

3. The password dialog box will be displayed. Type the password, then press the Enter key.

4. Re-type the password to confirm. If you typed the password correctly, the password will be installed.

To change a Power-On Password, do the following:

1. Start the Lenovo BIOS Setup Utility program (See ”Starting the Lenovo BIOS Setup Utility program” on

page 13.)

2. From the Security menu, select Set Power-On Password and press the Enter key.

3. The password dialog box will be displayed. Type the current password then press the Enter key.

4. Type the new password, then press the Enter key. Re-type the password to confirm the new password.

If you typed the new password correctly, the new password will be installed. A Setup Noticed confirming

that changes have been saved will be displayed.

To delete a previously set Power-On Password, do the following :

1. From the Security menu, select Set Power-On Password and press the Enter key.

2. The password dialog box will be displayed. Type the current password and press the Enter key.

3. To delete the Power-On Password, leave each new password line item blank, then press Enter. A

Setup Notice confirming that changes have been saved will be displayed.

4. Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.

5. Select Save changes and Exit from the menu.

Enabling or disabling a device

The Devices options is used to enable or disable user access to the following devices:

USB Functions Select whether to enable or disable USB (Universal Serial

Bus) functions. If the functions are disabled, no USB

devices can be used.

SATA Mode When this feature is set to Disabled, all devices

connected to the SATA connectors (e.g. hard disk drives

or the optical disk drive) are disabled and cannot be

accessed.

Onboard Audio Controller Select whether to enable or disable the Onboard Audio

Controller. When this feature is set to Disabled all

devices connected to the audio connectors (e.g.

headphones or a microphone) are disabled and cannot be

used.

Onboard Ethernet Controller or LAN Boot Agent Select whether to enable or disable the Onboard

Ethernet Controller, or select whether to enable or

disable load onboard PXE (Preboot Execution

Environment).

To enable or disable a device, do the following:

Chapter 5.Using the Setup Utility 15

1. Start the Setup Utility program (see “Starting the Setup Utility program” on page 13).

2. From the Setup Utility program menu, select Devices.

3. Select an option as follows:

Select USB Setup, press the Enter key, then select USB Functions.

Select ATA Device Setup, press the Enter key, then select SATA Mode.

Select Audio Setup, press the Enter key, then select Onboard Audio Controller.

Select Network Setup, press the Enter key, then select Onboard Ethernet Support or LAN Boot

Agent.

4. Select Disabled or Enabled and press the Enter key.

5. Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.

6. Select Save changes and Exit from the menu.

Notes:

a. If you do not want to save the settings, select Discard changes and Exit from the menu.

b. Select IDE/AHCI Mode: Device driver support is required for ACHI. Depending on how the hard disk

image was installed, changing this setting may prevent the system from booting.

Selecting a startup device

If your computer does not boot from a device such as the CD/DVD-ROM drive disk or hard disk as expected,

follow one of the procedures below.

Selecting a temporary startup device

Use this procedure to start up from any boot device.

Note: Not all CDs, DVDs or hard disk drives are bootable.

1. Turn off your computer.

2. Press and hold the F12 key then turn on the computer. When the Startup Device Menu appears,

release the F12 key.

Note: If the Startup Device Menu does not display using these steps, repeatedly press and release the

F12 key rather than keeping it pressed when turning on the computer.

3. Use ↑ and ↓ arrows to select the desired startup device from the Startup Device Menu and press the

Enter key to begin.

Note: Selecting a startup device from the Startup Device Menu does not permanently change the

startup sequence.

Selecting or changing the startup device sequence

To view or permanently change the configured startup device sequence, do the following:

1. Start the Lenovo BIOS Setup Utility program (see “Starting the Lenovo BIOS Setup Utility program” on

page 13).

2. From the Lenovo BIOS Setup Utility program main menu, select the Startup option.

3. Press the Enter key, and select the devices for the Primary Boot Sequence. Read the information

displayed on the right side of the screen.

4. Use ↑ and ↓ arrows to select a device. Use the <+> or <-> keys to move a device up or down. Use the

<×> key to exclude the device from or include the device in the boot sequence.

16 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

5. Return to the Lenovo BIOS Setup Utility program menu and select the Exit option.

6. Select Save changes and Exit from the menu.

Notes:

a. If you do not want to save the settings, select Discard changes and Exit from the menu.

b. If you have changed these settings and want to return to the default settings, select Load Optimal

Defaults from the menu.

Exiting the Lenovo BIOS Setup Utility program

After you finish viewing or changing settings, press the Esc key to return to the Lenovo BIOS Setup Utility

program main menu. You might have to press the Esc key several times. Do one of the following:

• If you want to save the new settings, select Save changes and Exit from the menu. When the Save &

reset window shows, select the Yes button, and then press the Enter key to exit the Lenovo BIOS Setup

Utility program.

• If you do not want to save the settings, select Discard changes and Exit from the menu. When the Reset

Without Saving window shows, select the Yes button, and then press the Enter key to exit the Lenovo

BIOS Setup Utility program.

Chapter 5.Using the Setup Utility 17

18 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Chapter 6. Symptom-to-FRU Index

The Symptom-to-FRU index lists error symptoms and possible causes. The most likely cause is listed first.

Always begin with Chapter 4, “General Checkout,” on page 11. This index can also be used to help you

decide which FRUs to have available when servicing a computer. If you are unable to correct the problem

using this index, go to “Undetermined problems” on page 20.

Notes:

• If you have both an error message and an incorrect audio response, diagnose the error message first.

• If you cannot run the diagnostic tests or you get a diagnostic error code when running a test but did

receive a POST error message, diagnose the POST error message first.

• If you did not receive any error message look for a description of your error symptoms in the first part of

this index.

Hard disk drive boot error

A hard disk drive boot error can be caused by the following.

Error FRU/Action

The startup drive is not included in the boot sequence

configuration.

Check the configuration and ensure the startup drive is in

the boot sequence.

No operating system is installed on the boot drive. Install an operating system on the boot drive.

The boot sector on the startup drive is corrupted. The drive must be formatted. Do the following:

1. Attempt to back up the data on the failing hard disk

drive.

2. Use the operating system to format the hard disk

drive.

The drive is defective. Replace the hard disk drive.

Power Supply Problems

Follow these procedures if you suspect there is a power supply problem.

Check/Verify FRU/Action

Check that the following are properly installed:

• Power Cord

• On/Off Switch connector

• System Board Power Supply connectors

• Microprocessor connections

Reseat connectors

Check the power cord. Power Cord

Check the power-on switch. Power-on Switch

POST error codes

Each time you turn the computer on, it performs a series of tests to check that the system is operating

correctly and that certain options are set. This series of tests is called the Power-On Self-Test, or POST.

POST does the following:

• Checks some basic motherboard operations

• Checks that the memory is working correctly

• Starts video operations

• Verifies that the boot drive is working

POST Error Message Description/Action

Keyboard error Cannot initialize the keyboard. Make sure the keyboard is

properly connected to the computer and that no keys are

held pressed during POST. To purposely configure the

computer without a keyboard, select Keyboardless

operation in Startup and set the option to Enabled. The

BIOS then ignores the missing keyboard during POST.

Reboot and Select proper Boot device or Insert Boot

Media in selected Boot device

The BIOS was unable to find a suitable boot device. Make

sure the boot drive is properly connected to the

computer. Make sure you have bootable media in the

boot device.

Undetermined problems

1. Power-off the computer.

2. Remove or disconnect the following components (if connected or installed) one at a time.

a. External devices (modem, printer, or mouse)

b. Extended video memory

c. External Cache

d. External Cache RAM

e. Hard disk drive

f. Disk drive

3. Power-on the computer to re-test the system.

4. Repeat steps 1 through 3 until you find the failing device or component.

If all devices and components have been removed and the problem continues, replace the system board.

20 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Chapter 7. Locating connectors, controls and components

This section provides illustrations to help locate the various connectors, controls and components of the

computer.

Font view

The following illustration shows the location of controls and components on the front of the computer.

Attention: Be careful not to block any air vents on the computer. Blocked air vents can cause overheating.

1. Camera LED indicator 3. Built-in camera

2. Infrared LEDs （Selected models only）

Left and right view

The following illustration shows the location of connectors, controls and components on the left and right

side of the computer.

1. USB 3.0 connectors 3. Power button

2. Optical drive （Optional）4. Cable clip

22 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Rear view

The following illustration shows the location of connectors and components on the rear of the computer.

1. Security cable slot 6. USB 2.0 connector

2. Power connector 7. USB 2.0 connector

3. Ethernet connector 8. USB 2.0 connector

4. HDMI-out connector 9. HDMI-in connector (Optional)

5. USB 2.0 connector 10. Air vent

Chapter 7.Locating connectors, controls and components 23

Hardware components

Note: Depending on your computer model, some of the following components might not be available.

None touch model

The following table lists the major FRUs shown in the illustration above and identifies which FRUs are also

self-service CRUs or optional-service CRUs.

Notes:

• Self-service CRUs: Parts to be installed or replaced by customer themselves.

• Optional-service CRUs: Parts can be installed or replaced by customers or technicians under certain

terms of the applicable warranty service type for your country or region.

• Non-CRUs: Parts must be installed or replaced only by trained service technicians

24 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

No. Description Self-service CRU Optional-service CRU

1Stand holder NO NO

2 Stand base NO NO

3 Rear cover NO NO

4 HDD shielding NO NO

5 HDD bracket NO NO

6 Hard disk drive NO NO

7 HDD cable NO NO

8ODD bezel NO NO

9 Optical disk drive NO NO

10 ODD bracket with latch

assembly

NO NO

11 ODD cable NO NO

12 LVDs cable NO NO

13 LCD Main frame NO NO

14 LCD panel NO NO

15 LCD backlight cable NO NO

16 Power switch board NO NO

17 Microphone Module (with

bracket)

NO NO

18 Speaker system NO NO

19 Front deco NO NO

20 Power adapter YES NO

21 Power cord YES NO

22 Hinge cover (top) NO NO

23 Hinge cover (bottom) NO NO

24 Camera module NO NO

25 Camera cable (within camera

module)

NO NO

26 Motherboard frame NO NO

27 System fan NO NO

28 Heatsink NO NO

29 Motherboard NO NO

30 CPU NO NO

31 Battery NO NO

32 Memory card NO NO

33 Wi-Fi cover NO NO

34 Wi-Fi card NO NO

Chapter 7.Locating connectors, controls and components 25

35 SSD NO NO

36 RF Antenna cables NO NO

37 Card reader cable NO NO

38 USB and Audio cable NO NO

39 Side I/O shielding NO NO

40 Side I/O USB board NO NO

41 Mouse YES NO

42 Keyboard YES NO

Touch model

No. Description Self-service CRU Optional-service CRU

1Stand holder NO NO

26 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

2 Stand base NO NO

3 Rear cover NO NO

4 HDD shielding NO NO

5 HDD bracket NO NO

6 Hard disk drive NO NO

7 HDD cable NO NO

8ODD bezel NO NO

9 Optical disk drive NO NO

10 ODD bracket with latch

assembly

NO NO

11 ODD cable NO NO

12 LVDs cable NO NO

13 LCD panel module NO NO

14 LCD backlight cable NO NO

15 Power switch board NO NO

16 Microphone Module (with

bracket)

NO NO

17 Speaker system NO NO

18 Front deco NO NO

19 Power adapter YES NO

20 Power cord YES NO

21 Hinge cover (top) NO NO

22 Hinge cover (bottom) NO NO

23 Camera module NO NO

24 Camera cable (within camera

module)

NO NO

25 Motherboard frame NO NO

26 System fan NO NO

27 Heatsink NO NO

28 Motherboard NO NO

29 CPU NO NO

30 Battery NO NO

31 Memory card NO NO

32 Wi-Fi cover NO NO

33 Wi-Fi card NO NO

34 SSD NO NO

35 RF Antenna cables NO NO

36 Card reader cable NO NO

Chapter 7.Locating connectors, controls and components 27

37 USB and Audio cable NO NO

38 Side I/O shielding NO NO

39 Side I/O USB board NO NO

40 Mouse YES NO

41 Keyboard YES NO

For detailed FRU information, such as the FRU part numbers and supported computer models, go to: http://

www.lenovo.com/serviceparts-lookup

28 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Identifying parts on the motherboard

The motherboard (sometimes called the planar or system board) is the main circuit board in your computer. It

provides basic computing functions and supports a variety of devices that are factory-installed or that you

can install later. The following illustration shows the location of connectors and components on the front of

the motherboard.

AIO 520–24AST / AIO 520–22AST

4 5 678 9 10 11

15 16 17 18

1. Battery 13. RAM connector

2. HDD SATA connecto 14. Wifi connector

3. HDD power connector 15. Speaker connector

4. DC-IN connector 16. I/O board connector

5. Ethernet connector 17. I/O board connector

6. HDMI-out connector 18. SSD SATA connector

7. USB 2.0 connector 19. Converter connector

8. USB 2.0 connector 20. Power switch board connector

9. USB 2.0 connector 21. 4-in-1 connector

10. USB 3.0 connector 22. System fan connector

11. HDMI-in connector 23. ODD board connector

12. Camera connector

Chapter 7.Locating connectors, controls and components 29

AIO 520–24IKU / AIO 520–22IKU

4 5 6 7 8 9 10 11

15 16 17 18

1. Battery 13. RAM connector

2. HDD SATA connecto 14. Wifi connector

3. HDD power connector 15. Speaker connector

4. DC-IN connector 16. I/O board connector

5. Ethernet connector 17. I/O board connector

6. HDMI-out connector 18. SSD SATA connector

7. USB 2.0 connector 19. Converter connector

8. USB 2.0 connector 20. Power switch board connector

9. USB 2.0 connector 21. 4-in-1 connector

10. USB 3.0 connector 22. System fan connector

11. HDMI-in connector 23. ODD board connector

12. Camera connector

30 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

AIO 520–24IKL/ AIO 520–22IKL

4 5 6 7 8 910 11

15 16 17 18

1. Battery 13. RAM connector

2. HDD SATA connecto 14. Wifi connector

3. HDD power connector 15. Speaker connector

4. DC-IN connector 16. I/O board connector

5. Ethernet connector 17. I/O board connector

6. HDMI-out connector 18. SSD SATA connector

7. USB 2.0 connector 19. Converter connector

8. USB 2.0 connector 20. Power switch board connector

9. USB 2.0 connector 21. 4-in-1 connector

10. USB 3.0 connector 22. System fan connector

11. HDMI-in connector 23. ODD board connector

12. Camera connector

Chapter 7.Locating connectors, controls and components 31

AIO520-24ICB/ AIO520-22ICB

4 5 6 7 8 9 10 11

15 16 17 18

1. Battery 13. RAM connector

2. HDD SATA connecto 14. Wifi connector

3. HDD power connector 15. Speaker connector

4. DC-IN connector 16. I/O board connector

5. Ethernet connector 17. I/O board connector

6. HDMI-out connector 18. SSD SATA connector

7. USB 2.0 connector 19. Converter connector

8. USB 2.0 connector 20. Power switch board connector

9. USB 2.0 connector 21. 4-in-1 connector

10. USB 3.0 connector 22. System fan connector

11. HDMI-in connector 23. ODD board connector

12. Camera connector

32 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

AIO520-24ARR

4 5 6 7 8 9 10 11

15 16 17 18

1. Battery 13. RAM connector

2. HDD SATA connecto 14. Wifi connector

3. HDD power connector 15. Speaker connector

4. DC-IN connector 16. I/O board connector

5. Ethernet connector 17. I/O board connector

6. HDMI-out connector 18. SSD SATA connector

7. USB 2.0 connector 19. Converter connector

8. USB 2.0 connector 20. Power switch board connector

9. USB 2.0 connector 21. 4-in-1 connector

10. USB 3.0 connector 22. System fan connector

11. HDMI-in connector 23. ODD board connector

12. Camera connector

Chapter 7.Locating connectors, controls and components 33

34 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Chapter 8. Replacing hardware

Attention: Do not remove the computer cover or attempt any repair before reading the “Important safety information”

in the Safety and Warranty Guide that was included with your computer. To obtain copies of the Safety and Warranty

Guide, go to the Support Web site at: http://consumersupport.lenovo.com.

Note: Use only parts provided by Lenovo.

General information

Pre-disassembly instructions

Before starting the disassembly procedure, make sure that you do the following:

1. Turn off the power to the system and all peripherals.

2. Unplug all power and signal cables from the computer.

3. Place the system on a flat, stable surface.

Replacing the keyboard and mouse

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20keyboard%20and%20mouse.dita" could not be parsed.

Replacing the adapter

Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

Step 2. Disconnect the adapter from the connector on the computer, then unplug the adapter from

electrical outlet.

Step 3. Connect the new adapter as shown.

Removing the stand base

Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the touch screen from scratches or

other damage.

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

36 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Step 2. Unplug all power cords from electrical outlets.

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to Locating connectors,

controls and components to locate the various connectors.

Step 4. Twist the hand screw ring counter-clockwise until the stand base is loosened. a

Step 5. Remove the stand base from the stand holder and put it aside. b

Removing the rear cover

Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the touch screen from scratches or

other damage.

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

Step 2. Unplug all power cords from electrical outlets.

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to Locating connectors,

controls and components to locate the various connectors.

Step 4. Remove the stand base. Refer to Removing the stand base.

Step 5. Remove the hinge covers.

Chapter 8.Replacing hardware 37

Step 6. Remove the screw cover rubber.

Step 7. Rotate the screwdriver 90 degrees to the right, and then lift up the rear cover from the left side

bottom.

38 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Step 8. Unplug the cables that connect to the Motherboard.

Chapter 8.Replacing hardware 39

Step 9. To reattach the rear cover:

a. Reconnect the cables to the motherboard.

b. Align the rear cover with the chassis.

c. Press the rear cover until it snaps into position.

Replacing the camera

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches

or other damage.

To replace the camera:

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

Step 2. Unplug all power cords from electrical outlets.

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to Locating connectors,

controls and components to locate the various connectors.

Step 4. Remove the stand base. Refer to Removing the stand base.

Step 5. Remove the rear cover. Refer to Removing the rear cover.

Step 6. Disconnect the camera cable form the corresponding connector on the motherboard. Refer to

Locating connectors, controls and components.

Step 7. Press the camera to make it out of the chassis and remove the six screws, and then press the

camera into the chassis again and pull out the camera module.

40 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Step 8. To install the new camera:

a. CPlace the new camera module into position, secure the module to the chassis with six screws

b. Connect the camera cable to the motherboard.

Step 9. Reattach the rear cover and stand base.

Replacing the heat-sink

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches

or other damage.

To replace the heat-sink:

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

Step 2. Unplug all power cords from electrical outlets.

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to Locating connectors,

controls and components to locate the various connectors.

Step 4. Remove the stand base. Refer to Removing the stand base.

Step 5. Remove the rear cover. Refer to Removing the rear cover.

Step 6. Remove the camera module. Refer to Replacing the camera.

Step 7. Loosen the nine screws that secure the heat-sink to the motherboard, and then lift up the heat-sink

and remove it.

Chapter 8.Replacing hardware 41

Attention: Place the heat-sink upside down on a flat surface to prevent thermal grease from contaminating

other components.

Attention: Use an alcohol pad to wipe the thermal grease off the CPU.

Step 8. To install the new heat-sink:

a. Position the new heat-sink on the motherboard so that the nine screws are aligned with the

holes in the motherboard and wind shielding.

b. Tighten the screws in numeric order to secure the new heat-sink to the motherboard.

Step 9. Reattach the camera module, rear cover and stand base.

Replacing the CPU

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches

or other damage.

To replace the CPU

Step 1. Remove any media (disks, CDs, DVDs, or memory cards) from the drives, shut down the operating

system, and turn off the computer and all attached devices.

Step 2. Unplug all power cords from electrical outlets.

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to “Left and right view” and

“Rear view” for help with locating the various connectors.

Step 4. Remove the heat-sink. Refer to “Replacing the heat sink”.

Step 5. Lift the small handle and open the retainer.

42 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Step 6. Lift the microprocessor straight up and out of the socket. 3

Attention: Do not touch the gold contacts on the bottom of the microprocessor. When handling the

microprocessor, touch only the sides.

Note: Do not drop anything onto the microprocessor socket while it is exposed. The socket pins must be

kept as clean as possible.

Step 7. Holding the sides of the microprocessor with your fingers, remove the protective cover 1 that

protects the gold contacts on the new microprocessor. 2

Chapter 8.Replacing hardware 43

Step 8. Holding the sides of the microprocessor with your fingers, position the microprocessor so that the

notches on the microprocessor are aligned with the tabs in the microprocessor socket.

Important: To avoid damaging the microprocessor contacts, keep the microprocessor completely level

while installing it into the socket.

Step 9. Lower the microprocessor straight down into its socket on the motherboard.

Step 10. To secure the microprocessor in the socket, close the microprocessor retainer and lock it into

position with the small handle.

Step 11. Use a thermal grease syringe to place 5 drops of grease on the top of the microprocessor. Each

drop of grease should be 0.03ml (3 tick marks on the grease syringe).

Step 12. Reattach the heat-sink, EMI cover, middle cover, optical drive, stand holder, foot cover and stand

base.

Replacing the hard disk drive

Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

44 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the touch screen from scratches or

other damage.

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

Step 2. Unplug all power cords from electrical outlets.

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to Locating connectors,

controls and components to locate the various connectors.

Step 4. Remove the stand base. Refer to Removing the stand base.

Step 5. Remove the rear cover. Refer to Removing the rear cover.

Step 6. Pull the hard disk drive and bracket to left, and then lift them up.

Step 7. Disconnect the signal cable from the hard disk drive.

Step 8. Remove the four screws that secure the hard disk drive to the bracket.

Step 9. To install the new hard disk drive:

a. Line up the new hard disk drive with the bracket and secure it with four screws.

b. Connect the data and power cables to the new hard disk drive.

c. Slide the hard disk drive and bracket back into position.

Step 10. Reattach the rear cover and stand base.

Replacing the system fan

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

Chapter 8.Replacing hardware 45

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches

or other damage.

To replace the system fan

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

Step 2. Unplug all power cords from electrical outlets.

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to Locating connectors,

controls and components to locate the various connectors.

Step 4. Remove the stand base. Refer to Removing the stand base.

Step 5. Remove the rear cover. Refer to Removing the rear cover.

Step 6. Remove the screw that secures the system fan to the chassis.

Step 7. Disconnect the system fan power cable from the motherboard.

Step 8. Lift the system fan up to remove it.

Step 9. To install the new system fan:

a. Place the new system fan into position, and then secure it to the chassis with one screw.

b. Connect the system fan power cable to the connector on the motherboard.

Step 10. Reattach the rear cover and stand base.

Replacing the optical drive

Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

46 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the touch screen from scratches or

other damage.

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

Step 2. Unplug all power cords from electrical outlets.

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to Locating connectors,

controls and components to locate the various connectors.

Step 4. Remove the stand base. Refer to Removing the stand base.

Step 5. Remove the rear cover. Refer to Removing the rear cover.

Step 6. Push the optical drive out using a screw driver or your hand.

Step 7. Push a small iron stick (paper clip) into the small hole on the optical drive bezel so that the disk

springs out as shown.

Step 8. Remove the optical drive bezel from the optical drive as shown. 1 2

Chapter 8.Replacing hardware 47

Step 9. To install the new optical drive:

a. Insert the tabs on the optical drive bezel into the corresponding holes in the new optical drive,

and then push the bezel back into position.

b. Gently push the disk forward until it snaps into position.

c. Slide the new optical drive into the drive bay.

Step 10. Reattach the rear cover and stand base.

Replacing the memory module

Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the touch screen from scratches or

other damage.

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

Step 2. Unplug all power cords from electrical outlets.

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to Locating connectors,

controls and components to locate the various connectors.

Step 4. Remove the stand base. Refer to Removing the stand base.

Step 5. Remove the rear cover. Refer to Removing the rear cover.

Step 6. Push out the latches on both sides of the memory socket to release the memory module and gently

pull the memory module upward to remove it from its socket.

48 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Step 7.

Step 8. To install the new memory module:

a. Position the new memory module over the memory slot. Ensure that the notch 2 on the

memory module aligns correctly with the slot key 1 in the memory socket. Press the memory

module down until snaps into position.

b. Reinstall the memory cover.

Step 9. Reattach the rear cover and stand base.

Replacing the solid state drive

Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the touch screen from scratches or

other damage.

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

Step 2. Unplug all power cords from electrical outlets.

Chapter 8.Replacing hardware 49

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to Locating connectors,

controls and components to locate the various connectors.

Step 4. Remove the stand base. Refer to Removing the stand base.

Step 5. Remove the rear cover. Refer to Removing the rear cover.

Step 6. Remove the screw that secure the solid state drive to the motherboard, and then slide out the solid

state drive. 3

Step 7. To install the new solid state drive:

a. Insert the solid state drive into the slot.

b. Secure the new solid state drive to motherboard with one screw.

c. Reinstall the memory cover.

Step 8. Reattach the rear cover and stand base.

Replacing the Wi-Fi card

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches

or other damage.

To replace the Wi-Fi card:

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

Step 2. Unplug all power cords from electrical outlets.

50 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to Locating connectors,

controls and components to locate the various connectors.

Step 4. Remove the stand base. Refer to Removing the stand base.

Step 5. Remove the rear cover. Refer to Removing the rear cover.

Step 6. Remove the screw that secures the Wi-Fi card to the motherboard.

Step 7. Disconnect the antenna cables from the Wi-Fi card.

Step 8. Pull the Wi-Fi card out of the slot.

Step 9. To install the new Wi-Fi card:

a. Insert the new Wi-Fi card into the Wi-Fi card slot.

b. Connect the antenna cables to the new Wi-Fi card.

c. Secure new the Wi-Fi card to the motherboard with the screw.

Step 10. Reattach the rear cover and stand base.

Replacing the side USB board

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches

or other damage.

To replace the side USB board:

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

Step 2. Unplug all power cords from electrical outlets.

Chapter 8.Replacing hardware 51

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to Locating connectors,

controls and components to locate the various connectors.

Step 4. Remove the stand base. Refer to Removing the stand base.

Step 5. Remove the rear cover. Refer to Removing the rear cover.

Step 6. Disconnect the antenna cables from the side USB board. 1

Step 7. Remove the screw that secures the side USB board to the bottom frame.

Step 8. Lift up the side USB board.

Step 9. To install the new side USB board:

a. Insert the new side USB board into the side USB board slot.

b. Secure the new side USB board to the bottom frame with the screw.

c. Connect the antenna cables to the new side USB board.

Step 10. Reattach the rear cover and stand base.

Replacing the motherboard

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches

or other damage.

To replace the motherboard:

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

Step 2. Unplug all power cords from electrical outlets.

52 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to Locating connectors,

controls and components to locate the various connectors.

Step 4. Remove the stand base. Refer to Removing the stand base.

Step 5. Remove the rear cover. Refer to Removing the rear cover.

Step 6. Remove the memory modules. Refer to Replacing the memory module.

Step 7. Remove the solid state drive. Refer to Replacing the solid state drive.

Step 8. Remove the heat-sink. Refer to Replacing the heat-sink.

Step 9. Remove the Wi-Fi card. Refer to Replacing the Wi-Fi card.

Step 10. Remove all the cables from the motherboard.

Step 11. Remove the eight screws that secure the motherboard to the chassis, and then lift the motherboard

up to remove it.

Step 12. To install the new motherboard:

a. Align the eight screw holes in the new motherboard with the screw holes in the chassis.

b. Secure the new motherboard to the chassis with eight screws.

c. Connect all the cables to the new motherboard.

Step 13. Install the following parts to the new motherboard:

• Wi-Fi card

• Heat-sink

• Solid state drive

• Memory module

Step 14. Reattach the rear cover and stand base.

Chapter 8.Replacing hardware 53

Removing the stand holder

Attention: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the touch screen from scratches or

other damage.

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

Step 2. Unplug all power cords from electrical outlets.

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to Locating connectors,

controls and components to locate the various connectors.

Step 4. Remove the stand base. Refer to Removing the stand base.

Step 5. Remove the rear cover. Refer to Removing the rear cover.

Step 6. Remove the six screws.

Step 7. To reattach the stand holder:

a. Align the holes in the stand holder with the corresponding holes in the chassis.

b. Secure the stand holder to the chassis with screws.

Replacing the Microphone module

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches

or other damage.

To replace the speaker system:

54 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

Step 2. Unplug all power cords from electrical outlets.

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to Locating connectors,

controls and components to locate the various connectors.

Step 4. Remove the stand base. Refer to Removing the stand base.

Step 5. Remove the rear cover. Refer to Removing the rear cover.

Step 6. Disconnect the microphone module cable from the connector on the motherboard, and remove the

screw that secures the microphone module to the motherboard.

Step 7. Lift up the microphone module to remove it.

Step 8. To install the new microphone module:

a. Secure the new microphone module to the motherboard with the screw.

b. Connect the cable to the motherboard.

Step 9. Reattach rear cover and stand base.

Replacing the speaker system

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches

or other damage.

To replace the speaker system:

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

Chapter 8.Replacing hardware 55

Step 2. Unplug all power cords from electrical outlets.

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to Locating connectors,

controls and components to locate the various connectors.

Step 4. Remove the stand base. Refer to Removing the stand base.

Step 5. Remove the rear cover. Refer to Removing the rear cover.

Step 6. Disconnect the speaker system cable from the connector on the motherboard, and then slide the

rubber screws of the speaker system out of the screw slots.

Step 7. Lift up the speaker system to remove it.

Step 8. To install the new speaker system:

a. Slide in the rubber screws of the new speaker system into the screw slots in the chassis.

b. Connect the cable to the motherboard.

Step 9. Reattach rear cover, and stand base.

Replacing the LCD panel module

Note: Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover.

Note: It may be helpful to place the computer face-down on a soft flat surface for this procedure. Lenovo

recommends that you use a blanket, towel, or other soft cloth to protect the computer screen from scratches

or other damage.

To replace the LCD panel module:

Step 1. Remove any media from the drives, shut down the operating system, and turn off the computer and

all attached devices.

Step 2. Unplug all power cords from electrical outlets.

56 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Step 3. Disconnect all cables attached to the computer. This includes power cords, input/output (I/O)

cables, and any other cables that are connected to the computer. Refer to Locating connectors,

controls and components to locate the various connectors.

Step 4. Remove the stand base. Refer to Removing the stand base.

Step 5. Remove the rear cover. Refer to Removing the rear cover.

Step 6. Remove the stand holder. Refer to Removing the stand holder.

Step 7. Remove the LVDS cable and converter cable from the connectors in the LCD panel.

Step 8. Remove the nineteen screws that secure the main frame to the LCD panel.

Step 9. Lift up the main frame as shown to remove it.

Chapter 8.Replacing hardware 57

Step 10. If your device is a touch computer, disconnect the touch cable from the connector on the

motherboard. Otherwise, skip this step. Refer to Locating connectors, controls and components to

locate the touch connector.

Step 11. To install the new the LCD panel module:

a. Align the new LCD panel with the main frame.

b. Secure the new LCD panel to the main frame with nineteen screws.

c. Connect the touch(touch model only), LVDS and converter cables to the connectors in the new

LCD panel.

58 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Step 12. Reattach the stand holder, rear cover and stand base.

Chapter 8.Replacing hardware 59

60 ideacentre All-In-One 520 (22 & 24 inch) Computer Hardware Maintenance Manual

Chapter 9. General information

This chapter provides general information that applies to all computer models covered by this manual.

Additional Service Information

This chapter provides additional information that the service representative might find helpful.

Power management

Power management reduces the power consumption of certain components of the computer such as the

system power supply, processor, hard disk drives, and some monitors.

Advanced configuration and power interface (ACPI) BIOS

As this computer has an ACPI BIOS system, the operating system is allowed to control the power

management features of the computer and the settings for Advanced Power Management (APM) BIOS mode

is ignored. Not all operating systems support ACPI BIOS mode.

Automatic Power-On features

The Automatic Power-On features within the Power Management menu allow you to enable and disable

features that turn on the computer automatically.

• Wake Up on Alarm: You can specify a date and time at which the computer will be turned on

automatically. This can be either a single event , a daily event or a weekly event.

• Wake Up on LAN: This feature allows LAN adapter card to wake the System.

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Lenovo ideacentre AIO 520-24ARR User Manual

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