About this manual
Chapter 1. Safety information
Chapter 2. Important service information
- Strategy for replacing FRUs
- Strategy for replacing FRUs for CTO, special-bid, and standard models
  - Product definition
  - FRU identification
Chapter 3. General checkout
Chapter 4. Related service information
Chapter 5. Function keys
Chapter 6. Locations
Chapter 7. FRU replacement notices
- Screw notices
- Retaining serial numbers
Chapter 8. Removing or replacing a FRU
Appendix A. Notices
Appendix B. Abbreviation table

Lenovo T480s User Manual

Displayed below is the user manual for T480s by Lenovo which is a product in the Notebooks category. This manual has pages.

Related Manuals

Lenovo T480s Manual

Lenovo Lenovo Y Gaming Stereo Headset Manual

Lenovo Lenovo Legion 5 15ACH6A Manual

Lenovo Lenovo Tab P11 5G Manual

Lenovo Lenovo Legion 5 Pro Manual

T480s Hardware Maintenance Manual

Note: Before using this information and the product it supports, be sure to read the general information

under Appendix A “Notices” on page 101.

Second Edition (September 2020)

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 manual . . . . . . . . . . . . iii

Chapter 1. Safety information . . . . . . 1

General safety . . . . . . . . . . . . . . . . 1

Electrical safety . . . . . . . . . . . . . . . . 1

Safety inspection guide . . . . . . . . . . . . . 2

Handling devices that are sensitive to electrostatic

discharge . . . . . . . . . . . . . . . . . . 3

Grounding requirements . . . . . . . . . . . . 4

Safety notices (multilingual translations) . . . . . . 4

Chapter 2. Important service

information . . . . . . . . . . . . . . . 21

Strategy for replacing FRUs . . . . . . . . . . 21

Strategy for replacing a solid-state drive . . . 21

Important notice for replacing a system

board . . . . . . . . . . . . . . . . . 22

How to use error message . . . . . . . . . 22

Strategy for replacing FRUs for CTO, special-bid,

and standard models. . . . . . . . . . . . . 22

Product definition . . . . . . . . . . . . 22

FRU identification . . . . . . . . . . . . 22

Chapter 3. General checkout . . . . . 25

What to do first . . . . . . . . . . . . . . . 25

Checkout guide . . . . . . . . . . . . . . . 26

Diagnosing problems . . . . . . . . . . . 26

Quick test programs . . . . . . . . . . . 27

UEFI diagnostic program . . . . . . . . . 27

Bootable diagnostic programs . . . . . . . 27

Power system checkout . . . . . . . . . . . 28

Checking the ac power adapter . . . . . . . 28

Checking the built-in battery and operational

charging . . . . . . . . . . . . . . . . 29

Checking the coin-cell battery . . . . . . . 29

Chapter 4. Related service

information . . . . . . . . . . . . . . . 31

Recovery information for the Windows 10

operating system . . . . . . . . . . . . . . 31

Resetting your computer . . . . . . . . . 31

Using advanced startup options . . . . . . 31

Recovering your operating system if Windows

10 fails to start . . . . . . . . . . . . . 31

Creating and using a recovery USB drive . . . 32

Passwords. . . . . . . . . . . . . . . . . 32

Power-on password . . . . . . . . . . . 33

Hard disk password . . . . . . . . . . . 33

Supervisor password . . . . . . . . . . . 33

How to remove the power-on password . . . 33

How to remove the hard disk password. . . . 34

Power management . . . . . . . . . . . . . 34

Sleep mode . . . . . . . . . . . . . . 35

Hibernation mode . . . . . . . . . . . . 35

Symptom-to-FRU index . . . . . . . . . . . 35

Numeric error codes . . . . . . . . . . . 36

Error messages . . . . . . . . . . . . . 37

Beep symptoms . . . . . . . . . . . . . 38

No-beep symptoms . . . . . . . . . . . 39

LCD-related symptoms . . . . . . . . . . 39

Intermittent problems . . . . . . . . . . . 40

Undetermined problems . . . . . . . . . 40

Chapter 5. Function keys . . . . . . . 41

Chapter 6. Locations . . . . . . . . . 43

Locating computer controls, connectors, and

indicators . . . . . . . . . . . . . . . . . 43

Front view . . . . . . . . . . . . . . . 43

Right-side view . . . . . . . . . . . . . 44

Left-side view . . . . . . . . . . . . . . 44

Bottom view . . . . . . . . . . . . . . 44

Rear view . . . . . . . . . . . . . . . 45

Status indicators . . . . . . . . . . . . 45

Locating FRUs and CRUs . . . . . . . . . . . 46

Major FRUs . . . . . . . . . . . . . . 48

LCD FRUs . . . . . . . . . . . . . . . 51

Miscellaneous parts . . . . . . . . . . . 52

Connector and cable guide . . . . . . . . 52

Looking up FRU information . . . . . . . . . . 56

Chapter 7. FRU replacement

notices . . . . . . . . . . . . . . . . . 57

Screw notices . . . . . . . . . . . . . . . 57

Retaining serial numbers . . . . . . . . . . . 58

Restoring the serial number of the system

unit . . . . . . . . . . . . . . . . . . 58

Retaining the UUID. . . . . . . . . . . . 59

Reading or writing the ECA information . . . . 59

Chapter 8. Removing or replacing a

FRU. . . . . . . . . . . . . . . . . . . 61

General guidelines. . . . . . . . . . . . . . 61

Before servicing the computer . . . . . . . . . 62

Disabling the built-in battery . . . . . . . . 62

Removing the nano-SIM card and nano-SIM-

card tray . . . . . . . . . . . . . . . . 62

Removing a major FRU . . . . . . . . . . . . 62

1010 Keyboard . . . . . . . . . . . . . 63

1020 Base cover assembly . . . . . . . . 67

1030 Wireless LAN card . . . . . . . . . . 69

1040 Wireless WAN card . . . . . . . . . 69

1050 M.2 solid-state drive . . . . . . . . . 70

1060 Memory module . . . . . . . . . . 71

1070 Ethernet connector drop-down door. . . 72

1080 Thermal fan assembly . . . . . . . . 72

1090 USB subcard assembly. . . . . . . . 73

1100 Built-in battery . . . . . . . . . . . 74

1110 Coin-cell battery . . . . . . . . . . 76

1120 Speaker assembly . . . . . . . . . . 76

1130 Smart card reader assembly or dummy

smart card reader . . . . . . . . . . . . 77

1140 SD card reader and audio subcard

assembly . . . . . . . . . . . . . . . 79

1150 Fingerprint reader and smart card reader

cable . . . . . . . . . . . . . . . . . 80

1160 Hall sensor and hall sensor cable . . . . 81

1170 Trackpad cable and trackpad . . . . . 82

1180 NFC cable and NFC module . . . . . . 84

1190 System board . . . . . . . . . . . 85

1200 dc-in cable and power button card . . . 88

1210 LCD unit . . . . . . . . . . . . . 89

1220 Keyboard bezel assembly . . . . . . . 92

Removing an LCD FRU . . . . . . . . . . . . 93

2010 LCD bezel sheet and LCD bezel . . . . 93

2020 LCD panel and LCD cable assembly. . . 93

2030 Hinge kit . . . . . . . . . . . . . 94

2040 ThinkShutter, camera card, and LED/

camera cable (for models with only

conventional camera) . . . . . . . . . . . 95

2050 Camera card and LED/camera cable (for

models with infrared camera). . . . . . . . 97

2060 Antenna kit . . . . . . . . . . . . 98

2070 LCD rear cover assembly . . . . . . . 100

Appendix A. Notices . . . . . . . . . . 101

Appendix B. Abbreviation table . . . . 103

ii T480s Hardware Maintenance Manual

About this manual

This manual contains service and reference information for the following ThinkPad® products.

ThinkPad T480s Machine Types (MT) 20L7, 20L8

Use this manual along with the advanced diagnostic tests to troubleshoot problems.

Important: This manual is intended only for trained service technicians who are familiar with ThinkPad

products. Use this manual along with the advanced diagnostic tests to troubleshoot problems effectively.

Before servicing a ThinkPad product, be sure to read all the information under Chapter 1 “Safety information”

on page 1 and Chapter 2 “Important service information” on page 21.

iv T480s Hardware Maintenance Manual

Chapter 1. Safety information

This chapter presents following safety information that you need to be familiar with before you service a

ThinkPad notebook computer.

• “General safety” on page 1

• “Electrical safety” on page 1

• “Safety inspection guide” on page 2

• “Handling devices that are sensitive to electrostatic discharge” on page 3

• “Grounding requirements” on page 4

• “Safety notices (multilingual translations)” on page 4

General safety

Follow these rules to ensure general safety:

• Observe good housekeeping in the area of the machines during and after maintenance.

• When lifting any heavy object:

1. Make sure that you can stand safely without slipping.

2. Distribute the weight of the object equally between your feet.

3. Use a slow lifting force. 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 object that weighs more than 16 kg (35 lb) or that you

think is too heavy for you.

• Do not perform any action that causes hazards to the customer, or that makes the equipment unsafe.

• Before you start the machine, make sure that other service technicians and the customer's personnel are

not in a hazardous position.

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

machine.

• Keep your toolcase away from walk areas so that other people will not trip over it.

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

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

• Insert the ends of your necktie or scarf inside clothing or fasten it with a nonconductive clip, about 8

centimeters (3 inches) from the end.

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

Attention: 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.

• Reinstall all covers correctly before returning the machine to the customer.

• Fan louvers on the machine help to prevent overheating of internal components. Do not obstruct fan

louvers or cover them with labels or stickers.

Electrical safety

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, near

their equipment, rubber floor mats that contain small conductive fibers to decrease electrostatic discharges.

Do not use this type of mat to protect yourself from electrical shock.

• 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 main units

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

to power-off the wall box that supplies power to the machine, and to lock the wall box in the off position.

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

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

Attention: 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.

Attention: An electrical shock can occur only when there is a complete circuit. By observing the above

rule, you may prevent a current from passing through your body.

– When using testers, 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; Instructions for these

precautions are in the safety sections of maintenance information. Use extreme care when measuring high

voltages.

• Regularly inspect and maintain your electrical hand tools for safe operational condition.

• 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 moist floors,

nongrounded power extension cables, power surges, and missing safety grounds.

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

conductive; such touching can cause personal injury and machine damage.

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

places in a machine:

– Power supply units

– Pumps

– Blowers and fans

– Motor generators

– Similar units as listed above

This practice ensures correct grounding of the units.

• 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 purpose of this inspection guide is to assist you in identifying potentially unsafe conditions. As each

machine was designed and built, required safety items were installed to protect users and service

technicians from injury. This guide addresses only those items. You should use good judgment to identify

potential safety hazards due to attachment of non-ThinkPad features or options not covered by this

inspection guide.

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

whether you can continue without first correcting the problem.

2T480s Hardware Maintenance Manual

Consider these conditions 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 a bulging capacitor

• Mechanical hazards, such as loose or missing hardware

To determine whether there are any potentially unsafe conditions, use the following checklist at the

beginning of every service task. 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 the frame ground.

b. The power cord should be the authorized type specified for your computer. Go to: https://

support.lenovo.com/partslookup

c. Insulation must not be frayed or worn.

4. Check for cracked or bulging batteries.

5. Remove the cover.

6. Check for any obvious non-ThinkPad alterations. Use good judgment as to the safety of any non-

ThinkPad alterations.

7. Check inside the unit for any obvious unsafe conditions, such as metal filings, contamination, water or

other liquids, or signs of fire or smoke damage.

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

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

with.

Handling devices that are sensitive to electrostatic discharge

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 machine, the part, the work mat, and the

person handling the part are all at the same charge.

Notes:

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.

• 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 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 to guard against ESD damage is desirable but not necessary.

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

Chapter 1.Safety information 3

– When working on a double-insulated or battery-operated system, use an ESD common ground or

reference point. 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 (multilingual translations)

The safety notices in this section are provided in the following languages:

• English

• Arabic

• Brazilian Portuguese

• French

• German

• Hebrew

• Japanese

• Korean

• Spanish

• Traditional Chinese

DANGER

4T480s Hardware Maintenance Manual

DANGER

Chapter 1.Safety information 5

6T480s Hardware Maintenance Manual

PERIGO

Chapter 1.Safety information 7

PERIGO

8T480s Hardware Maintenance Manual

PERIGO

DANGER

Chapter 1.Safety information 9

DANGER

VORSICHT

10 T480s Hardware Maintenance Manual

VORSICHT

Chapter 1.Safety information 11

VORSICHT

12 T480s Hardware Maintenance Manual

Chapter 1.Safety information 13

14 T480s Hardware Maintenance Manual

Chapter 1.Safety information 15

16 T480s Hardware Maintenance Manual

Chapter 1.Safety information 17

18 T480s Hardware Maintenance Manual

Chapter 1.Safety information 19

20 T480s Hardware Maintenance Manual

Chapter 2. Important service information

This chapter introduces following important service information that applies to all machine types supported

by this manual:

• “Strategy for replacing FRUs” on page 21

– “Strategy for replacing a solid-state drive” on page 21

– “Important notice for replacing a system board” on page 22

– “How to use error message” on page 22

• “Strategy for replacing FRUs for CTO, special-bid, and standard models” on page 22

– “Product definition” on page 22

– “FRU identification” on page 22

Important:

• Advise customers to contact the Lenovo® Customer Support Center if they need any assistance in

obtaining or installing any software fixes, drivers, and UEFI BIOS downloads. Telephone numbers for

Lenovo Support are available at: https://pcsupport.lenovo.com/supportphonelist

• System Disassembly/Reassembly videos that show the FRU removals or replacements for the Lenovo

authorized service technicians are available in the following support site:

https://www.lenovoservicetraining.com/ion/

Strategy for replacing FRUs

Before replacing parts:

Ensure that all software fixes, drivers, and UEFI BIOS downloads are installed before replacing any FRUs

listed in this manual.

After a system board is replaced, ensure that the latest UEFI BIOS is loaded to the system board before

completing the service action.

To download software fixes, drivers, and UEFI BIOS, go to https://support.lenovo.com and follow the

instructions on the screen.

Use the following strategy to prevent unnecessary expense for replacing and servicing FRUs:

• If you are instructed to replace a FRU but the replacement does not correct the problem, reinstall the

original FRU before you continue.

• Some computers have both a processor board and a system board. If you are instructed to replace either

the processor board or the system board, and replacing one of them does not correct the problem,

reinstall that board, and then replace the other one.

• If an adapter or a device consists of more than one FRU, any of the FRUs may be the cause of the error.

Before replacing the adapter or device, remove the FRUs, one by one, to see if the symptoms change.

Replace only the FRU that changed the symptoms.

Strategy for replacing a solid-state drive

Always try to run a low-level format before replacing a solid-state drive. This will cause all customer data on

the drive to be lost. Be sure that the customer has a current backup of the data before doing this task.

Attention: The drive startup sequence in the computer you are servicing may have been changed. Be

extremely careful during write operations such as copying, saving, or formatting. If you select an incorrect

drive, data or programs can be overwritten.

Important notice for replacing a system board

Some components mounted on a system board are very sensitive. Improper handling of a system board can

cause damage to those components, and may cause a system malfunction.

Attention: When handling a system board:

• Do not drop a system board or apply any excessive force to it.

• Avoid rough handling of any kind.

• Avoid bending a system board and hard pushing to prevent cracking at each BGA (Ball Grid Array)

chipset.

How to use error message

Use the error codes displayed on the screen to diagnose failures. If more than one error code is displayed,

begin the diagnosis with the first error code. Whatever causes the first error code may also cause false error

codes. If no error code is displayed, see whether the error symptom is listed in the Symptom-to-FRU Index

for the computer you are servicing.

Strategy for replacing FRUs for CTO, special-bid, and standard models

This topic provides information about the model types and FRU identification.

Product definition

This topic introduces different model types and how to identify each type.

Dynamic Configure To Order (CTO) model

This model provides the ability for a customer to configure a Lenovo solution from a Web Site, and have this

configuration sent to fulfillment, where it is built and shipped directly to the customer. The machine label and

eSupport will load these products as the 4-character MT, 4-character model, and 2-character country code.

The model is “CTO1” and the default country code is “WW” (example: 20AACTO1WW).

Special-bid model

This is a unique configuration that has been negotiated between Lenovo and the customer. A unique MTM

consists of a 4-character MT, a 4-character model, and a numeric 2-character country code is provided to

the customer to place orders (example: 20AA000955). The country code assigned is numeric and does not

designate a specific country or region. The custom model factsheet for the MTM indicates which country the

special bid MTM is set up for. Special-bid offering is not generally announced.

Standard model

Standard models (fixed configuration) are announced and offered to all customers. The MTM portion of the

machine label consists of a 4-character MT, a 4-character model, and an alphabetic 2-character country

code. The country code assigned is alphabetic and represents a designated country or region (example:

20AA0009UK).

FRU identification

Use Lenovo eSupport to identify major FRUs, FRU part numbers, and FRU descriptions for a product at an

MT - serial number level. Examples of major FRUs are solid-state drive, system board, and liquid crystal

display (LCD).

To identify the major FRUs for a product, do the following:

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

2. Type the Machine Type and Serial Number in the corresponding fields.

22 T480s Hardware Maintenance Manual

3. Click Submit.

eSupport also can be used to view the general FRU list for a product. The FRU list is a general list of

components and does not contain specific model information.

To get the general FRU list for a product, do the following:

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

2. Follow the instructions on the screen to select a product.

3. Click the Product & Parts tab.

4. Select System Service Parts to view a general FRU list.

Chapter 2.Important service information 23

24 T480s Hardware Maintenance Manual

Chapter 3. General checkout

This chapter introduces following information:

• “What to do first” on page 25

• “Checkout guide” on page 26

– “Diagnosing problems” on page 26

– “Quick test programs” on page 27

– “UEFI diagnostic program” on page 27

– “Bootable diagnostic programs” on page 27

• “Power system checkout” on page 28

Before you go to the checkout guide, be sure to read the following important notes.

Important notes:

• Only certified trained personnel should service the computer.

• Before replacing any FRU, read the entire page on removing and replacing FRUs.

• When you replace FRUs, it is recommended use new nylon-coated screws.

• Be extremely careful during such write operations as copying, saving, or formatting. The sequence

of the drives in the computer that you are servicing might have been altered. If you select an incorrect

drive, data or programs might be overwritten.

• Replace a FRU only with another FRU of the correct model. When you replace a FRU, ensure that the

model of the machine and the FRU part number are correct by referring to the web site: https://

support.lenovo.com/partslookup

• A FRU should not be replaced because of a single, unreproducible failure. Single failures can occur

for a variety of reasons that have nothing to do with a hardware defect, such as cosmic radiation,

electrostatic discharge, or software errors. Consider replacing a FRU only when a problem recurs. If you

suspect that a FRU is defective, clear the error log and run the test again. If the error does not recur, do

not replace the FRU.

• Be careful not to replace a nondefective FRU.

What to do first

When you return a FRU, you must include the following information in the parts exchange form or parts return

form that you attach to it:

1. Name and phone number of service technician

2. Date of service

3. Date on which the machine failed

4. Date of purchase

5. Failure symptoms, error codes appearing on the display, and beep symptoms

6. Procedure index and page number in which the failing FRU was detected

7. Failing FRU name and part number

8. Machine type, model number, and serial number

9. Customer's name and address

Note: During the warranty period, the customer may be responsible for repair costs if the computer damage

was caused by misuse, accident, modification, unsuitable physical or operating environment, or improper

maintenance by the customer. Following is a list of some common items that are not covered under warranty

and some symptoms that might indicate that the system was subjected to stress beyond normal use.

Before checking problems with the computer, determine whether the damage is covered under the warranty

by referring to the following list:

The following are not covered under warranty:

• LCD panel cracked from the application of excessive force or from being dropped

• Scratched (cosmetic) parts

• Distortion, deformation, or discoloration of the cosmetic parts

• Plastic parts, latches, pins, or connectors that have been cracked or broken by excessive force

• Damage caused by liquid spilled into the system

• Damage caused by the improper insertion of a PC card or the installation of an incompatible card

• Improper disc insertion or use of an optical drive

• Fuses blown by attachment of a nonsupported device

• Forgotten computer password (making the computer unusable)

• Sticky keys caused by spilling a liquid onto the keyboard

• Use of an incorrect ac power adapter on laptop products

The following symptoms might indicate damage caused by nonwarranted activities:

• Missing parts might be a symptom of unauthorized service or modification.

• Check for obvious damage to a solid-state drive. If the spindle of a solid-state drive becomes noisy, the

solid-state drive might have been dropped or subject to excessive force.

Checkout guide

Use the following procedures as a guide in identifying and correcting problems with the ThinkPad notebook

computers.

Note: The diagnostic tests are intended to test only ThinkPad products. The use of non-ThinkPad products,

prototype cards, or modified options can lead to false indications of errors and invalid system responses.

1. Identify the failing symptoms in as much detail as possible.

2. Verify the symptoms. Try to re-create the failure by running the diagnostic test or by repeating the

operation.

Diagnosing problems

Many computer problems can be solved without outside assistance. If you experience a problem with your

computer, the first place to start is the troubleshooting information in your computer documentation. If you

suspect a software problem, see the documentation, including readme files and help information systems,

that come with the operating system or program.

Lenovo Companion or Lenovo Vantage is preinstalled on your computer. It supports the hardware scan

function. It combines diagnostic tests, system information collection, security status, and support

information, along with hints and tips for optimal system performance.

Note: If you are unable to isolate and repair the problem yourself after running the program, save and print

the log files created by the program. You need the log files when you speak to a Lenovo technical support

representative.

The troubleshooting information or the diagnostic programs might tell you that you need additional or

updated device drivers or other software. You can get the latest technical information and download device

drivers and updates from the Lenovo Support Web site at:

https://support.lenovo.com

For additional information, see the help system of the program.

26 T480s Hardware Maintenance Manual

Quick test programs

Run quick test programs to troubleshoot and resolve computer problems, especially when the computer

does not have the Lenovo Solution center installed.

To download and install a quick test program, go to https://www.lenovo.com/diags, and follow the instructions

on the Web site.

To run a test using quick test program, do the following:

1. Go to the C:\SWTOOLS\ldiag directory.

2. Double-click the lsc_lite.exe file.

3. When the User Account Control window opens, click Yes.

4. Select the device class to be tested.

5. Select the devices to be tested.

6. Select the test to be performed.

7. Follow the instructions on the screen to start the test. When a problem is detected, information

messages are displayed. Refer to the messages to troubleshoot the problem.

UEFI diagnostic program

A UEFI diagnostic program is preinstalled on the computer. It enables you to test memory modules and

internal storage devices, view system information, and check and recover bad sectors on internal storage

devices.

To run the UEFI diagnostic program, do the following:

1. Turn on the computer. If the computer cannot be turned on, go to “Power system checkout” on page 28,

and check the power sources. If an error code is displayed, go to “Symptom-to-FRU index” on page 35

for error code descriptions and troubleshooting hints.

2. When the Lenovo logo is displayed, repeatedly press and release the F10 key. The main screen of the

UEFI diagnostic program is displayed.

3. Follow the instructions on the screen to use the diagnostic program.

Bootable diagnostic programs

If the computer you are servicing is not installed with the UEFI diagnostic program, you can download a

bootable diagnostic program from the Lenovo Support Web site. The bootable diagnostic programs enable

you to test computer memory and internal storage devices, view system information, and check and recover

the internal storage devices. To use the bootable diagnostic programs, you can create a bootable diagnostic

medium on a USB device or CD.

To create a bootable diagnostic medium, do the following:

1. Go to https://www.lenovo.com/diags.

2. Click Lenovo Bootable Diagnostics.

3. Follow the instructions on the Web site to create a bootable diagnostic medium.

To use the diagnostic medium you have created, do one of the following:

• If you have created the bootable diagnostic medium on a USB device, do the following:

1. Attach the USB device to the computer.

Chapter 3.General checkout 27

2. Turn on the computer. If the computer cannot be turned on, go to “Power system checkout” on page

28, and check the power sources. If an error code is displayed, go to “Symptom-to-FRU index” on

page 35 for error code descriptions and troubleshooting hints.

3. When the Lenovo logo is displayed, repeatedly press and release the F12 key. When the Boot Menu

window opens, release the F12 key.

4. Use the arrow keys to select USB HDD and then press Enter. The diagnostic program will be

launched automatically.

5. Follow the instructions on the screen to use the diagnostic program.

• If you have created the bootable diagnostic medium on a CD, do the following:

1. Turn on the computer. If the computer cannot be turned on, go to “Power system checkout” on page

28, and check the power sources. If an error code is displayed, go to “Symptom-to-FRU index” on

page 35 for error code descriptions and troubleshooting hints.

2. Insert the CD into the optical drive.

3. Restart the computer.

4. When the Lenovo logo is displayed, repeatedly press and release the F12 key. When the Boot Menu

window opens, release the F12 key.

5. Use the arrow keys to select ATAPI CDx (x: 0, 1, ...) and then press Enter. The diagnostic program will

be launched automatically.

6. Follow the instructions on the screen to use the diagnostic program.

Power system checkout

To verify if a battery pack or an ac power adapter is functional, do the following:

1. Turn off the computer.

2. Connect the ac power adapter.

3. Turn on the computer. If the computer can be turned on, it means that either the battery pack or the ac

power adapter is functional.

4. Insert a straightened paper clip into the emergency reset hole to reset the computer. If the computer is

still powered on, it means that the ac power adapter is functional.

5. Turn off the computer.

6. Disconnect the ac power adapter and turn on the computer. If the computer can be turned on, it means

that the battery pack is functional.

If you suspect a power problem, see the appropriate one of the following power supply checkouts:

• “Checking the ac power adapter” on page 28

• “Checking the built-in battery and operational charging” on page 29

• “Checking the coin-cell battery” on page 29

Checking the ac power adapter

You are here because the computer fails only when the ac power adapter is used.

• If the power problem occurs only when the docking station or the port replicator is used, replace the

docking station or the port replicator.

• If the system status indicator does not blink three times when an ac power source is connected, check the

power cord of the ac power adapter for correct continuity and installation.

• If the computer does not charge during operation, go to “Checking the built-in battery and operational

charging” on page 29.

Note: Noise from the ac power adapter does not always indicate a defect.

Checking the USB-C type ac power adapter

To check the USB-C type ac power adapter, do the following:

28 T480s Hardware Maintenance Manual

1. Connect the computer to a power outlet and turn on the computer.

2. Start Lenovo Companion program, and then click Hardware Settings ➙ Power. The ac power adapter

information is displayed.

Ensure that you use the USB-C type ac power adapter that is shipped with the computer to provide enough

power to the computer. Otherwise, a message will be displayed, prompting you that the computer will not be

charged or will be charged slowly.

Checking the built-in battery and operational charging

This computer supports only batteries specially designed for this specific system and manufactured by

Lenovo or an authorized builder. The system does not support unauthorized batteries or batteries designed

for other systems. If an unauthorized battery or a battery designed for another systems is installed, the

system will not charge.

Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and

provides no warranties for failures or damage arising out of their use.

Move your pointer to the battery-status icon in the Windows notification area to check the battery status. The

battery-status icon displays the percentage of battery power remaining and how long you can use your

computer before you must charge the battery.

To check whether the battery charges properly during operation, do the following:

1. Discharge the battery until the remained battery power is less than 50%.

2. Connect the computer to ac power to charge the battery. If the battery status icon in the Windows

notification area indicates that the battery is not charging, remove the battery and let it return to room

temperature.

Note: The built-in battery is NOT customer replaceable. Contact a qualified Lenovo technician to

replace the built-in battery.

3. Reinstall the battery. If the battery is still not charging, replace the battery pack.

4. Check the battery status icon again. If the same error still exists, replace the system board.

Checking the coin-cell battery

To check the coin-cell battery, do the following:

1. Disable the built-in battery. See “Disabling the built-in battery” on page 62.

2. Remove the coin-cell battery. See “1110 Coin-cell battery” on page 76.

3. Measure the voltage of the coin-cell battery. See the following illustration.

Wire Voltage (V dc)

Red +2.5 to +3.2

Black Ground

• If the voltage is correct, replace the system board.

• If the voltage is not correct, replace the coin-cell battery.

• If the coin-cell battery discharges quickly after replacement, replace the system board.

Chapter 3.General checkout 29

30 T480s Hardware Maintenance Manual

Chapter 4. Related service information

This chapter presents following information:

• “Recovery information for the Windows 10 operating system” on page 31

• “Passwords” on page 32

• “Power management” on page 34

• “Symptom-to-FRU index” on page 35

Service Web site: When the latest maintenance diskette and the system program service diskette become

available, they will be posted on https://support.lenovo.com

Recovery information for the Windows 10 operating system

This chapter provides information about the Windows recovery solutions on the Windows 10 operating

system.

Resetting your computer

If your computer does not perform well, you might consider resetting your computer. In the resetting

process, you can choose to keep your files or remove them, and then reinstall the Windows operating

system.

To reset your computer, do the following:

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

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 instructions on the screen to reset your computer.

Using advanced startup options

The advanced startup options enable you to do the following:

• Change the firmware settings of the computer

• Change the startup settings of the Windows operating system

• Start the computer from an external device

• Restore the Windows operating system from a system image

To use advanced startup options, do the following:

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

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 startup option you want, and then follow the instructions on the screen.

Recovering your operating system if Windows 10 fails to start

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.

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

Creating and using a recovery USB drive

You can create a recovery USB drive 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.

It is recommended that you create a recovery USB drive as early as possible. 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

Creating a recovery USB drive

To create a recovery USB drive, you need a USB drive with at least 16 GB of storage capacity. The actual

USB capacity that is required depends on the size of the recovery image.

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

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

To create a recovery USB drive, do the following:

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

1. Connect a proper USB drive (at least 16 GB of storage) to the computer.

2. Type recovery in the search box on the taskbar. Then click Create a recovery drive.

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

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

Using the recovery USB drive

If you cannot start your computer, use the recovery USB drive to recover your computer.

To use a recovery USB drive, do the following:

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

1. Connect the recovery USB drive to the computer.

2. Turn on or restart the computer. Before the Windows operating system starts, repeatedly press F12. The

Boot Menu window opens.

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

4. Select a preferred keyboard layout.

5. Click Troubleshoot to display optional recovery solutions.

6. Select a corresponding recovery solution according to your situation. Then follow the instructions on the

screen to complete the process.

Passwords

As many as three passwords may be needed for any ThinkPad notebook computer: the power-on password,

the hard disk password, and the supervisor password.

32 T480s Hardware Maintenance Manual

If any of these passwords has been set, a prompt for it will be displayed on the screen whenever the

computer is turned on. The computer does not start until the password is entered.

Note: If only a supervisor password is set, the password prompt will not be displayed when the operating

system is started.

Power-on password

A power-on password protects the system from being powered on by an unauthorized person. The

password must be entered before an operating system can be started. For instructions on how to remove the

power-on password, see “How to remove the power-on password” on page 33.

Hard disk password

There are two kinds of hard disk passwords:

• User hard disk password - for the user

• Master hard disk password - for the system administrator, who can use it to get access to the hard disk

even if the user has changed the user hard disk password

Note: There are two modes for the hard disk password: User only and Master + User. The Master + User

mode requires two hard disk passwords; the system administrator enters both in the same operation. The

system administrator then provides the user hard disk password to the system user.

Attention: If the user hard disk password has been forgotten, check whether a master hard disk password

has been set. If it has, it can be used for access to the solid-state drive. If no master hard disk password is

available, neither Lenovo nor Lenovo authorized service technicians provide any services to reset either the

user or the master hard disk password, or to recover data from the solid-state drive. The solid-state drive can

be replaced for a scheduled fee.

For how to remove the hard disk password, see “How to remove the hard disk password” on page 34.

Supervisor password

The supervisor password protects the system information stored in the ThinkPad Setup program. It provides

the following security features:

• If only a supervisor password is set, a password prompt is displayed when you try to start the ThinkPad

Setup program. Unauthorized users cannot change most of the system configuration options in the

ThinkPad Setup program without the password.

• The system administrator can use the supervisor password to access a computer even if the user of that

computer has set a power-on password. The supervisor password overrides the power-on password.

• The system administrator can set the same supervisor password on many ThinkPad notebook computers

to make administration easier.

Attention: If the supervisor password has been forgotten and cannot be made available to the service

technician, there is no service procedure to reset the password. The system board must be replaced for a

scheduled fee.

How to remove the power-on password

To remove a power-on password, do the following:

If no supervisor password has been set, do the following to remove the power-on password:

1. Turn off the computer.

2. Remove the built-in battery. For instructions on how to remove the built-in battery, see “1100 Built-in

battery” on page 74.

Chapter 4.Related service information 33

3. Remove the coin-cell battery. For instructions on how to remove the coin-cell battery, see “1110 Coin-

cell battery” on page 76. Wait for a few seconds.

4. Reinstall the coin-cell battery. For instructions on how to install the coin-cell battery, see “1110 Coin-cell

battery” on page 76.

5. Reinstall the built-in battery. For instructions on how to reinstall the built-in battery, see “1100 Built-in

battery” on page 74.

6. Turn on the computer and wait until the POST ends. After the POST ends, the password prompt does

not appear. The power-on password has been removed.

If a supervisor password has been set and is known to the service technician, do the following to remove the

power-on password:

1. Turn on the computer.

2. When the Lenovo logo is displayed, immediately press F1.

3. Type the supervisor password to enter the ThinkPad Setup program.

4. Select Security.

5. Select Password.

6. Select Power-On Password.

7. Type the current supervisor password in the Enter Current Password field. then leave the Enter New

Password field blank, and press Enter twice.

8. In the Changes have been saved window, press Enter.

9. Press F10 to save changes and exit the ThinkPad Setup program.

How to remove the hard disk password

Attention: If User only mode is selected and the user hard disk password has been forgotten and cannot be

made available to the service technician, neither Lenovo nor Lenovo authorized service technicians provide

any services to reset the user hard disk password or to recover data from the solid-state drive. To put the

system back to operational status, the only Lenovo and Lenovo-authorized service solution would be to

replace the solid-state drive with a scheduled fee.

To remove a user hard disk password that has been forgotten, when the supervisor password and master

hard disk password are known, do the following:

1. Turn on the computer.

2. When the Lenovo logo is displayed, immediately press F1 to enter the ThinkPad Setup program.

3. Select Security.

4. Select Password.

5. Select Hard-disk x password, where x is the letter of the hard disk drive. A pop-up window opens.

6. Select Master hard disk password.

7. Type the current master hard disk password in the Enter Current Password field. Then leave the Enter

New Password field blank, and press Enter twice.

8. Press F10.

9. Press F10 to save changes and exit the ThinkPad Setup program. The user hard disk password and the

master hard disk password have been removed.

Power management

To reduce power consumption, the computer has two power management modes: sleep and hibernation.

34 T480s Hardware Maintenance Manual

Sleep mode

When the computer enters sleep mode, the following events occur:

• The LCD is powered off.

• The solid-state drive is powered off.

• The microprocessor stops.

To put your computer into sleep mode, press Fn+4.

To return to normal operation, press the Fn key only.

In certain circumstances, the computer goes into sleep mode automatically:

• After a period of inactivity specified in power plan settings

• When the battery power is low

Hibernation mode

In hibernation mode, the following occurs:

• The system status, RAM, VRAM, and setup data are stored on the solid-state drive.

• The system is powered off.

Note: If the computer enters the hibernation mode while it is docked to the docking station or the port

replicator, do not undock it before resuming normal operation. If you do undock it and then try to resume

normal operation, you will get an error message, and you will have to restart the system.

If you have defined one of the following actions as the event that causes the system to go into hibernation

mode, perform that action.

• Closing the lid.

• Pressing the power button.

Also, the computer goes into hibernation mode automatically after a period of inactivity specified in power

plan settings.

When the power is turned on, the computer returns from hibernation mode and resumes operation. The

hibernation file in the boot record on the solid-state drive is read, and system status is restored from the

solid-state drive.

Symptom-to-FRU index

This section contains following information:

• “Numeric error codes” on page 36

• “Error messages” on page 37

• “Beep symptoms” on page 38

• “No-beep symptoms” on page 39

• “LCD-related symptoms” on page 39

• “Intermittent problems” on page 40

• “Undetermined problems” on page 40

The symptom-to-FRU index in this section lists symptoms and errors and their possible causes. The most

likely cause is listed first, in boldface type.

Note: Do the FRU replacement or other actions in the sequence shown in the column headed “FRU or

action, in sequence.” If replacing a FRU does not solve the problem, put the original part back in the

computer. Do not replace a nondefective FRU.

Chapter 4.Related service information 35

This index can also help you determine, during regular servicing, what FRUs are likely to need to be replaced

next.

A numeric error is displayed for each error detected in POST or system operation. In the displays, n can be

any number.

If no numeric code is displayed, check the narrative descriptions of symptoms. If the symptom is not

described there, go to “Intermittent problems” on page 40.

Note: For a device not supported by diagnostic codes in the ThinkPad notebook computers, see the manual

for that device.

Numeric error codes

Table 1. Numeric error codes

Symptom or error FRU or action, in sequence

0177

Bad SVP data, stop POST task—The checksum of the

supervisor password in the EEPROM is not correct.

Replace the system board.

0183

Bad CRC of Security Settings in EFI Variable. Enter the

ThinkPad Setup program. – The checksum of the Security

settings in the EFI Variable is not correct.

1. Run the ThinkPad Setup program. The settings

will be corrected automatically. Then save the

current settings by pressing F10.

2. Replace the system board.

0187

EAIA data access error—The access to EEPROM is failed.

Replace the system board.

0188

Invalid RFID Serialization Information Area.

Replace the system board.

0189

Invalid RFID configuration information area—The

EEPROM checksum is not correct.

Replace the system board.

0190

Critical low-battery error

1. Charge the battery pack.

2. Replace the battery pack.

0191

System Security—Invalid Remote Change requested.

1. Run the ThinkPad Setup program, and then save

current setting by pressing F10.

2. Replace the system board.

0199

System Security— Security password retry count

exceeded.

1. Run the ThinkPad Setup program. The retry count

will be reset. Then save the current settings by

pressing F10.

2. Replace the system board.

0270

Real Time Clock Error— System Real Time Clock is not

functional.

Have the computer serviced.

0271

Check Date and Time settings— Neither the date nor the

time is set in the computer.

Set the date and time, using ThinkPad Setup.

1802

Unauthorized network card is plugged in—Turn off and

remove the network card.

1. Remove network card.

2. Replace the system board.

1820

More than one external fingerprint reader is attached.

Power off and remove all but the reader that you set up

within your main operating system.

Remove all but the reader that you set up for the

authentication.

36 T480s Hardware Maintenance Manual

Table 1. Numeric error codes (continued)

Symptom or error FRU or action, in sequence

2100

Detection error on HDD0 (Main HDD)

Have the hard disk drive serviced.

2101

Detection error on SSD1 (M.2)

1. Reseat the M.2 solid-state drive.

2. Replace the M.2 solid-state drive.

3. Replace the system board.

2102

Detection error on SSD2 (M.2)

1. Reseat the M.2 solid-state drive.

2. Replace the M.2 solid-state drive.

3. Replace the system board.

2110

Read error on HDD0 (Main HDD)

1. Reseat the hard disk drive.

2. Replace the main hard disk drive.

3. Replace the system board.

2111

Read error on SSD1 (M.2)

1. Reseat the M.2 solid-state drive.

2. Replace the M.2 solid-state drive.

3. Replace the system board.

2112

Read error on SSD2 (M.2)

1. Reseat the M.2 solid-state drive.

2. Replace the M.2 solid-state drive.

3. Replace the system board.

2200

Machine Type and Serial Number are invalid. Have the computer serviced.

2201

Machine UUID is invalid

Replace the system board.

Error messages

Table 2. Error messages

Symptom or error FRU or action, in sequence

Fan error. 1. Replace the fan.

2. Apply thermal grease.

3. Replace the system board.

Thermal sensing error. Replace the system board.

The battery installed is not supported by this system and

will not charge. Please replace the battery with the correct

Lenovo battery for this system. Press the ESC key to

continue.

Replace the battery.

This system does not support batteries that are not

genuine Lenovo made or authorized. The system will

continue to boot, but may not charge unauthorized

batteries. Press the ESC key to continue.

Attention: Lenovo has no responsibility for the

performance or safety of unauthorized batteries, and

provides no warranties for failures or damage arising out

of their use.

Replace the battery.

Chapter 4.Related service information 37

Beep symptoms

Lenovo SmartBeep technology enables you to decode beep errors with your smartphone when a black

screen occurs with beeps from your computer. To decode the beep error with Lenovo SmartBeep

technology, do the following:

1. Go to https://support.lenovo.com/smartbeep or scan the following QR Code.

2. Download the proper diagnostic app and install it on your smartphone.

3. Run the diagnostic app and place the smartphone near the computer.

4. Press the Fn key on your computer to emit the beep again. The diagnostic app decodes the beep error

and shows possible solutions on the smartphone.

The following section describes some beep errors and the corresponding solutions.

Note: Do not attempt to service a product yourself unless instructed to do so by the Customer Support

Center or product documentation. Only use a Lenovo-authorized service provider to repair your product.

Error codes Solutions

0001: Reset error (platform reset not de-asserted) 1. Remove all power resources (the ac power

adapter, removable battery, and coin-cell battery).

If your computer has a built-in battery, reset the

computer by inserting a straightened paper clip

into the emergency-reset hole. Wait for one

minute. Then reconnect all power resources.

2. Replace the system board (service provider only).

0002: Internal bus error Replace the system board (service provider only).

0281: General embedded controller error Replace the system board (service provider only).

0282: Memory module error 1. Reinstall or replace the memory module.

2. Replace the system board (service provider only).

0283: PCI resource error 1. Remove PCIe devices (the M.2 card, PCIe card,

and so on) (service provider only).

2. Replace the system board (service provider only).

0284: TCG-compliant functionality-related error (might be

the BIOS code validation failure) Replace the system board (service provider only).

0285: TCG-compliant functionality-related error (might be

the TPM initialization failure) Replace the system board (service provider only).

0286: Integrated graphics error Replace the system board (service provider only).

38 T480s Hardware Maintenance Manual

Error codes Solutions

0287: Discrete graphics error 1. Reinstall or replace the discrete graphics card

(service provider only).

2. Replace the system board (service provider only).

0288: Computer display error 1. Reconnect the display cable on both the system

board side and the computer display side (service

provider only).

2. Replace the system board (service provider only).

No-beep symptoms

Table 3. No-beep symptoms

Symptom or error FRU or action, in sequence

No beep, power-on indicator on, LCD blank, and no

POST.

1. Ensure that every connector is connected tightly

and correctly.

2. Reseat memory module.

3. Replace the system board.

No beep, power-on indicator on, and LCD blank during

POST. 1. Reseat memory module.

2. Replace the system board.

The power-on password prompt appears. A power-on password or a supervisor password is set.

Type the password and press Enter.

The hard-disk password prompt appears. A hard disk password is set. Type the password and

press Enter.

LCD-related symptoms

Important: The TFT LCD for the notebook computer contains many thin-film transistors (TFTs). The

presence of a small number of dots that are missing, discolored, or always lighted is characteristic of TFT

LCD technology, but excessive pixel problems can cause viewing concerns.If the LCD you are servicing has

two or less visible defective pixels, it should not be considered faulty. However, if the LCD has three or more

visible defective pixels, it will be deemed as defective by Lenovo and it should be replaced.

Notes:

• This policy applies to all ThinkPad notebooks purchased on 1 January, 2008 or later.

• Lenovo will not provide warranty replacement if the LCD is within specifications because we cannot

guarantee that any replacement LCD will have zero pixel defects.

• One pixel consists of R, G, B sub-pixels.

Table 4. LCD-related symptoms

Symptom or error FRU or action, in sequence

No beep, power-on indicator on, and a blank LCD during

POST.

Replace the system board.

• LCD backlight not working.

• LCD too dark.

• LCD brightness cannot be adjusted.

• LCD contrast cannot be adjusted.

1. Reseat the LCD connectors.

2. Replace the LCD assembly.

3. Replace the system board.

Chapter 4.Related service information 39

Table 4. LCD-related symptoms (continued)

Symptom or error FRU or action, in sequence

• LCD screen unreadable.

• Characters missing pixels.

• Screen abnormal.

• Wrong color displayed.

1. See important note for “LCD-related symptoms.”

2. Reseat all LCD connectors.

3. Replace the LCD assembly.

4. Replace the system board.

Horizontal or vertical lines displayed on LCD. Replace the LCD assembly.

Intermittent problems

Intermittent system hang problems can be due to a variety of causes that have nothing to do with a hardware

defect, such as cosmic radiation, electrostatic discharge, or software errors. FRU replacement should be

considered only when a problem recurs.

When analyzing an intermittent problem, do the following:

1. Run the diagnostic test for the system board in loop mode at least 10 times.

2. If no error is detected, do not replace any FRUs.

3. If any error is detected, replace the FRU shown by the FRU code. Rerun the test to verify that no more

errors exist.

Undetermined problems

If the diagnostic tests did not identify the adapter or device that has failed, if wrong devices are installed, or if

the system simply is not operating, follow these procedures to isolate the failing FRU (do not isolate FRUs

that have no defects).

Verify that all attached devices are supported by the computer.

Verify that the power supply being used at the time of the failure is operating correctly. See “Power system

checkout” on page 28.

1. Turn off the computer.

2. Visually check each FRU for damage. Replace any damaged FRU.

3. Remove or disconnect all of the following devices:

a. Non-ThinkPad devices

b. Devices attached to the docking station or the port replicator

c. Printer, mouse, and other external devices

d. Battery pack

e. Solid-state drive

f. External diskette drive or optical drive

g. Memory module

h. PC cards

4. Turn on the computer.

5. Determine whether the problem has been solved.

6. If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU.

7. If the problem remains, replace the following FRUs one at a time (do not replace a nondefective FRU):

a. System board

b. LCD assembly

40 T480s Hardware Maintenance Manual

Chapter 5. Function keys

The following table describes the functions of function keys and key combinations.

Table 5. Function keys

Function key and key combination Description

You can configure the Fn key and function keys in the Keyboard

Properties window by doing the following:

1. Go to Control Panel, and then change the view of Control Panel from

Category to Large icons or Small icons.

2. Click Lenovo - Keyboard Manager and the Keyboard Manager

window is displayed.

3. Select the options of your preference.

Press Fn+Esc to switch the key function between the standard F1–F12

function and the special function printed as an icon on each key. When

the Fn Lock indicator is off, you can use the default function. You can

change the default function in the Keyboard Properties window.

Mute or unmute the speakers.

If you mute the sound and turn off your computer, the sound will remain

muted when you turn on your computer. To turn on the sound, press

or .

Decrease the speaker volume.

Increase the speaker volume.

Mute or unmute the microphones.

Darken the computer display.

Brighten the computer display.

Manage external displays.

Enable or disable the built-in wireless features.

Open the Settings window.

Enable or disable the built-in Bluetooth features.

Table 5. Function keys (continued)

Function key and key combination Description

Open a keyboard setting page.

Invoke the function defined by yourself. To define or change the action

for the F12 key, do the following:

1. Open Lenovo Companion.

2. Click Hardware Settings and then click the input icon .

3. Locate the Keyboard: User-defined Key section and follow the

instructions on the screen to complete the setting.

On the Input page, you can also define different functions for the key

combinations with F12, such as Shift+F12, Alt+F12, or Ctrl+F12.

Open the Snipping Tool program.

Fn+Spacebar If your computer supports keyboard backlight, press Fn+Spacebar to

switch between the different keyboard backlight status.

Fn+B This key combination has the same function as the Break key on a

conventional external keyboard.

Fn+P This key combination has the same function as the Pause key on a

conventional external keyboard.

Fn+S This key combination has the same function as the SysRq key on a

conventional external keyboard.

Fn+K This key combination has the same function as the ScrLK or Scroll Lock

key on a conventional external keyboard.

Fn+4 Press Fn+4 to put the computer to sleep mode. To wake up the

computer, press the Fn key or the power button.

Fn+Left arrow key This key combination has the same function as the Home key.

Fn+Right arrow key This key combination has the same function as the End key.

42 T480s Hardware Maintenance Manual

Chapter 6. Locations

This chapter introduces the locations of the hardware components on your computer.

Locating computer controls, connectors, and indicators

This topic introduces the locations of the computer controls, connectors, and indicators.

Front view

1 Infrared camera (available on some models) 2 Conventional camera (available on models with the

infrared camera)

3 Microphones 4 Conventional camera with ThinkShutter (lens cover)

(available on some models)

5 Power button 6 Fingerprint reader (available on some models)

7 NFC label for silver model (available on some models) 8 TrackPoint® buttons

9 Trackpad 10 NFC mark for black model (available on some models)

11 TrackPoint pointing stick 12 Screen (multi-touch screen on some models)

Right-side view

1 Smart-card slot (available on some models) 2 USB 3.1 connector Gen 1

3 Fan louvers 4 Security-lock slot

Left-side view

1 USB-C™ connector 2 USB-C™ connector (Thunderbolt™ 3 compatible)

3 Docking-station connector 4 Ethernet connector

5 Always On USB 3.1 connector Gen 1 6 HDMI™ connector

7 Audio connector 8 SD-card slot

Bottom view

44 T480s Hardware Maintenance Manual

1 Fan louvers 2 Emergency-reset hole

3 Docking-station hook holes 4 Speakers

Rear view

1 Nano-SIM-card tray

Status indicators

This topic provides information about locating and identifying the various status indicators on your computer.

Note: Depending on the model, your computer might look different from the following illustrations.

Chapter 6.Locations 45

Table 6. Status indicators

Indicator Meaning

1 Caps Lock indicator On: You can type uppercase letters by directly pressing the letter keys.

2 Fn Lock indicator This indicator shows the status of Fn Lock function. For more information, see

Chapter 5 “Function keys” on page 41.

3 Speaker-mute indicator On: The speakers are muted.

4 Microphone-mute indicator On: The microphones are muted.

5 Camera status indicator On: The camera is in use.

6 8 System status indicators The indicator in the ThinkPad logo on the computer lid and the indicator in the

power button show the system status of your computer.

• Blinks for three times: The computer is initially connected to power.

• On: The computer is on (in normal mode).

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

• Blinks rapidly: The computer is entering sleep or hibernation mode.

• Blinks slowly: The computer is in sleep mode.

7 Fingerprint reader indicator This indicator shows the status of fingerprint reader.

9 ac power status indicator This indicator shows the battery power status of the computer when ac power is

connected.

• White: connected to ac power (battery power 90%–100%)

• Amber: connected to ac power (battery power 0%–90%)

• Off: not connected to ac power

Locating FRUs and CRUs

This topic introduces the following service parts:

• “Major FRUs” on page 48

• “LCD FRUs” on page 51

46 T480s Hardware Maintenance Manual

Notes:

• FRUs: Refer to parts that must be installed or replaced only by trained service technicians. If customers choose to

replace the FRUs by themselves, the product warranty might be affected.

• Each FRU is available for all types or models, unless otherwise specified.

• CRU statement for customers:

You can resolve some problems with your product with a replacement part you can install yourself, called a

“Customer Replaceable Unit” or “CRU.” Some CRUs are designated as self-service CRUs and others are

designated as optional-service CRUs. Installation of self-service CRUs is your responsibility. For optional-service

CRUs, you can either install the CRU yourself or you can request that a Service Provider install the CRU according to

the warranty service for your product. 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 can find a list of CRUs for your product in this Hardware Maintenance Manual. An electronic

version of this manual can be found at https://support.lenovo.com. 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. See your

Lenovo Limited Warranty documentation for full details.

ThinkPad 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.

Chapter 6.Locations 47

Major FRUs

48 T480s Hardware Maintenance Manual

Table 7. Major FRUs

No. FRU descriptions Self-service

CRU

Optional-service

CRU

1LCD unit (see “LCD FRUs” on page 51) No No

2Keyboard No Yes

3dc-in cable No No

4Power button card No No

5Keyboard bezel assembly No No

6M.2 solid-state drive Yes No

7Memory module *Yes No

8Wireless LAN card Yes No

9Wireless WAN card *Yes No

10 Nano-SIM-card tray Yes No

11 SD card reader and audio subcard cable No No

12 SD card reader and audio subcard No No

13 Battery No No

14 Coin-cell battery No No

15 Thermal fan assembly No No

16 USB subcard cable No No

17 USB subcard No No

18 Speaker assembly No No

19 Base cover assembly Yes No

20 Smart card reader and fingerprint reader cable *No No

21 Smart card reader *No No

22 Hall sensor No No

23 Hall sensor cable No No

24 NFC module No No

25 NFC cable No No

26 System board No No

27 Ethernet connector drop-down door No No

28 Trackpad No No

29 Trackpad cable No No

aLenovo factory recovery USB key *Yes No

bMiscellaneous parts kits (see “Miscellaneous parts” on page 52) No No

cPower cord Yes No

dac power adapter Yes No

* Available on some models

Chapter 6.Locations 49

Note: The Lenovo factory recovery USB key a is used to restore the Microsoft Windows operating system.

It might not come with the computer, and a user might order it from https://pcsupport.lenovo.com/

lenovorecovery, though additional shipping and handling fees might apply.

50 T480s Hardware Maintenance Manual

LCD FRUs

Table 8. LCD FRUs

No. FRU descriptions Self-service

CRU

Optional-service

CRU

1LCD bezel sheet No No

2LCD bezel No No

3Infrared camera card (available on some models) No No

4LCD panel No No

5 Hinge kit No No

6LED/camera cable assembly No No

7LCD rear cover assembly No No

Chapter 6.Locations 51

Table 8. LCD FRUs (continued)

No. FRU descriptions Self-service

CRU

Optional-service

CRU

8 Antenna kit No No

9LCD cable No No

10 Conventional camera card (available on some models) No No

11 ThinkShutter (for models with only conventional camera) No No

Miscellaneous parts

Table 9. Miscellaneous part

FRU descriptions Self-service

CRU

Optional-service

CRU

Screw kit:

• Screw M2 x L2.2, black(9)

• Screw M2 x L4, silver (7)

• Screw M2 x L2.7, black (11)

• Screw M2 x L2.2 + 2.3, black (4)

• Screw M2.5 x L4.5, silver (6)

• Screw M2.5 x L2.2, black (4)

• Screw M2 x L2, black (4)

• Spec

No No

Mechanical miscellaneous kit:

• Microphone rubber

• Docking-station connector bracket

• Trackpad mylar

• Smart card reader mylar

• Ethernet extension connector Gen 2 cover

• Spec

No No

Keyboard removal tool (product part number: 01LX856) No No

Label kit:

• GEO label

• Spec

No No

Connector and cable guide

This section provides information for Lenovo authorized service technicians to help identify connectors and

cables for replacement purpose. To view each FRU and the exploded illustration of the computer, see “Major

FRUs” on page 48 and “LCD FRUs” on page 51.

Note: Depending on your model, some connectors or cables might not be available.

52 T480s Hardware Maintenance Manual

System board connectors and cables

Table 10. System board

No. Connector/feature Internal cable required Cable connection

1Camera connector (internal) LED/camera cable Connect the cable to this

connector.

2dc-in connector (internal) dc-in cable Connect one end to the power

button card and the other end to

this connector.

3Thermal fan connector (internal) Thermal fan assembly cable The thermal fan assembly comes

with the cable. Connect the cable

to this connector.

4Memory module slot (internal) No Insert the memory module into this

slot.

5Wireless-LAN card slot (internal) No Insert the wireless-LAN card into

this slot.

6LCD connector (internal) LCD cable Connect one end to the LCD panel,

and the other end to this

connector.

7Wireless-WAN card slot (internal) No Insert the wireless-WAN card into

this slot.

8USB-C connector (external) No Connect USB-C compatible

devices to this connector.

Chapter 6.Locations 53

Table 10. System board (continued)

No. Connector/feature Internal cable required Cable connection

9USB-C connector (Thunderbolt 3

compatible) (external)

No Connect USB-C compatible or

Thunderbolt 3 compatible devices

to this connector.

10 Ethernet extension connector Gen

2 (external)

No This connector does not work

individually. The connectors 8, 9

and 10 work together as the

docking-station connector.

11 Ethernet connector (external) No Connect the computer to a LAN

through this connector.

12 Speaker assembly connector

(internal)

Speaker assembly cable The speaker assembly comes with

the cable. Connect the cable to this

connector.

13 Always On USB 3.1 connector Gen

1 (external)

No Connect USB-A compatible

devices to this connector.

14 HDMI connector (external) No Connect a compatible digital audio

device or video monitor to this

connector.

15 Coin-cell battery connector

(internal)

Coin-cell battery cable The coin-cell battery comes with

cable. Connect the cable to this

connector.

16 SD card reader/audio subcard

connector (internal)

SD card reader/audio subcard

cable

Connect one end to the SD card

reader/audio subcard, and the

other end to this connector.

17 NFC connector (internal) NFC cable Connect one end to the NFC

module and the other end to this

connector.

18 Built-in battery connector (internal) No Connect the built-in battery directly

to this connector.

19 Solid-state drive slot (internal) No Insert the solid state drive directly

into this slot.

20 Trackpad connector (internal) Trackpad cable Connect one end to the trackpad

and the other end to this

connector.

21 Hall sensor connector (internal) Hall sensor cable Connect one end to the Hall

sensor, and the other end to this

connector.

22 Smart card reader and fingerprint

reader connector (internal)

Smart card reader/fingerprint

reader cable

Connect one end of the cable to

the smart card reader, one end to

the fingerprint reader module, and

another end to this connector.

23 USB subcard connector (internal) USB subcard cable Connect one end to the USB

subcard, and the other end to this

connector.

24 Nano-SIM-card slot (external) No If the computer supports wireless

WAN, insert a nano-SIM card into

this slot to establish wireless-WAN

connection.

54 T480s Hardware Maintenance Manual

Table 10. System board (continued)

No. Connector/feature Internal cable required Cable connection

25 TrackPoint pointing stick

connector (internal)

TrackPoint pointing stick cable The TrackPoint pointing stick

comes with the cable. Connect the

cable to this connector.

26 Keyboard connector (internal) Keyboard assembly cable The keyboard assembly comes

with the cable. Connect the cable

to this connector.

SD card reader/audio subcard connectors

Table 11. SD card reader/audio subcard

No. Connector/feature Internal cable required Cable connection

1Audio connector (external) No Connect headphones or a headset

with 3.5-mm (0.14-inch) 4-pole

plug to this connector.

2SD card reader connector

(external)

No Insert an SD card into this slot to

read the data on the card.

3SD card reader/audio subcard

connector (internal)

SD card reader/audio subcard

cable

Connect one end of the SD card

reader/audio subcard cable to the

connector on the system board,

and the other end to this

connector.

Smart card reader connector and cable

Chapter 6.Locations 55

Table 12. Smart card reader

No. Connector/feature Internal cable required Cable connection

1Smart-card reader connector

(internal)

Smart-card reader/fingerprint

reader cable

Connect the end a of the cable to

the smart-card reader/fingerprint

reader connector on the system

board, end b to the fingerprint

reader module, and end c to this

connector.

Looking up FRU information

For detailed FRU information, including part numbers, descriptions, and substitution part numbers, go to:

https://support.lenovo.com/partslookup

56 T480s Hardware Maintenance Manual

Chapter 7. FRU replacement notices

This chapter presents notices related to removing and replacing parts. Read this chapter carefully before

replacing any FRU.

CRU statement for customers:

You can resolve some problems with your product with a replacement part you can install yourself, called a

“Customer Replaceable Unit” or “CRU.” Some CRUs are designated as self-service CRUs and others are

designated as optional-service CRUs. Installation of self-service CRUs is your responsibility. For optional-

service CRUs, you can either install the CRU yourself or you can request that a Service Provider install the

CRU according to the warranty service for your product. 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 can find a list of CRUs for your product in this Hardware

Maintenance Manual. An electronic version of this manual can be found at https://support.lenovo.com. 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. See your Lenovo Limited Warranty documentation for full

details.

Screw notices

Loose screws can cause a reliability problem. In the ThinkPad notebook computer, this problem is

addressed with special nylon-coated screws that have the following characteristics:

• They maintain tight connections.

• They do not easily come loose, even with shock or vibration.

• They are harder to tighten.

Do the following when you service this machine:

• Keep the screw kit in your tool bag. For the part number of the screw kit, go to https://support.lenovo.com/

partslookup.

• It is recommended to use new screws.

• It is recommended to use each screw only once.

Tighten screws as follows:

• Plastic to plastic

Turn an additional 90 degrees after the screw head touches the surface of the plastic part.

• Logic card to plastic

Turn an additional 180 degrees after the screw head touches the surface of the logic card.

Notes:

• Ensure that you use the correct screw. It is recommended to use new screws for replacements. If you

have a torque screwdriver, tighten all screws firmly to the torque specified in the screw information table

for each step.

• Ensure that torque screwdrivers are calibrated correctly following country specifications.

Retaining serial numbers

This topic provides instructions on the following:

• “Restoring the serial number of the system unit” on page 58

• “Retaining the UUID” on page 59

Restoring the serial number of the system unit

When the computer was manufactured, the EEPROM on the system board was loaded with the serial

numbers of the system and all major components. These numbers need to remain the same throughout the

life of the computer.

If you replace the system board, you must restore the serial number of the system unit to its original value.

The serial number of the system unit is written on the label attached to the bottom of the computer.

If you can not find the serial number of the system unit on the bottom of the computer, try the following

method to get the number:

Note: Before you perform the operation, ensure that the UEFI/Legacy setting within the Startup menu in the

ThinkPad Setup program is set to UEFI Only.

1. Connect a USB memory key to the computer.

2. Go to https://www.lenovo.com/maintenanceutilities and follow the instructions on the screen to create a

Maintenance Key.

Note: Only an authorized Lenovo service technician can access the above Web site.

3. Restart the computer.

4. When the logo is displayed, press Esc. The ThinkPad Config Information Update Utility interface is

displayed.

5. Type 1 under Enter the action desired, then press Enter. The ThinkPad Serial Number Update Utility for

Asset ID screen is displayed.

6. Type 2 under Enter the action desired, then press Enter. The serial number of each device in your

computer is displayed; the serial number of the system unit is listed as follow:

20- Serial number

7. Record the serial number of the system unit.

After you replace the system board, do the following to restore the serial number of the system unit:

1. Connect the Maintenance Key to the computer.

58 T480s Hardware Maintenance Manual

2. When the logo is displayed, press Esc. The ThinkPad Config Information Update Utility interface is

displayed.

3. Type 1 under Enter the action desired, then press Enter. The ThinkPad Serial Number Update Utility for

Asset ID screen is displayed.

4. Type 1 under Enter the action desired, then press Enter. Then follow the instructions on the screen to

restore the serial number of the system unit.

Retaining the UUID

The Universally Unique Identifier (UUID) is a 128-bit number uniquely assigned to your computer at

production and stored in the EEPROM of your system board.

The algorithm that generates the number is designed to provide unique IDs until the year A.D. 3400. No two

computers in the world have the same number.

When you replace the system board, perform the following steps to create a new UUID for the system board

if the system board does not have a UUID:

Note: Before you perform the operation, ensure that the UEFI/Legacy setting within the Startup menu in the

ThinkPad Setup program is set to UEFI Only.

1. Connect a USB memory key to the computer.

2. Go to https://www.lenovo.com/maintenanceutilities and follow the instructions on the screen to create a

Maintenance Key.

Note: Only an authorized Lenovo service technician can access the above Web site.

3. Restart the computer.

4. When the logo screen is displayed, press Esc. The ThinkPad Config Information Update Utility interface

is displayed.

5. Type 2 under Enter the action desired, then press Enter. The Auto UUID generation utility interface is

displayed.

6. Type y under Change UUID. OK? [Y/N], then press Enter. A new UUID is created and written. If a valid

UUID already exists, it is not overwritten.

Reading or writing the ECA information

Information on Engineering Change Announcements (ECA) is stored in the EEPROM of the system board.

The electronic storage of this information simplifies the procedure to check if the ECA has been previously

applied to a machine. The machine does not need to be disassembled to check for the ECA application.

To check what ECAs have been previously applied to the machine, use the ECA Information Read/Write

function on the LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance Key.

1. Insert the latest version of LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance Key, and

then restart the computer.

2. From the main menu, select 6. Set ECA Information.

3. To read the ECA information, select 2. Read ECA/rework number from EEPROM and follow the

instructions on the screen. To read the box build date, select 5. Read box build date from EEPROM,

and follow the instruction on the screen.

After an ECA has been applied to the machine, the EEPROM must be updated to reflect the ECA's

application. Use the latest version of LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance

Key to update the EEPROM.

Note: Only the ECA number is stored in the EEPROM. The machine type of the ECA is assumed to be the

same as the machine type of the machine that had the ECA applied to it.

Chapter 7.FRU replacement notices 59

1. Insert the latest version of LENOVO ThinkPad Hardware Maintenance Diskette or Maintenance Key, and

then restart the computer.

2. From the main menu, select 6. Set ECA Information.

3. To write the ECA information, select 1. Write ECA/rework number from EEPROM, and follow the

instructions on the screen. To write the box build date, select 4. Write box build date from EEPROM,

and follow the instruction on the screen.

If the system board is being replaced, try to read the ECA information from the old system board and transfer

the information to the new system. If the system board is inoperable, this will not be possible.

60 T480s Hardware Maintenance Manual

Chapter 8. Removing or replacing a FRU

This chapter provides instructions on how to remove or replace a FRU.

CRU statement for customers:

You can resolve some problems with your product with a replacement part you can install yourself, called a

“Customer Replaceable Unit” or “CRU.” Some CRUs are designated as self-service CRUs and others are

designated as optional-service CRUs. Installation of self-service CRUs is your responsibility. For optional-

service CRUs, you can either install the CRU yourself or you can request that a Service Provider install the

CRU according to the warranty service for your product. 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 can find a list of CRUs for your product in this Hardware

Maintenance Manual. An electronic version of this manual is available for downloading at https://

support.lenovo.com. You might be required to return the defective 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 part within thirty (30)

days of your receipt of the replacement CRU. See your Lenovo Limited Warranty documentation for full

details.

General guidelines

When removing or replacing a FRU, be sure to observe the following general guidelines:

1. Do not try to service any computer unless you have been trained and certified. An untrained person runs

the risk of damaging parts.

2. Before replacing any FRU, review Chapter 7 “FRU replacement notices” on page 57.

3. Begin by removing any FRUs that have to be removed before replacing the failing FRU. Any such FRUs

are listed at the beginning of each FRU replacement section. Remove them in the order in which they are

listed.

4. Follow the correct sequence in the steps for removing a FRU, as given in the illustrations by the numbers

in square callouts.

5. When turning a screw, turn it in the direction as given by the arrow in the illustration.

6. When removing a FRU, move it in the direction as given by the arrow in the illustration.

7. To put the new FRU in place, reverse the removal procedure and follow any notes that pertain to

replacement.

8. When replacing a FRU, use the correct screws as shown in the replacement procedures.

DANGER

Before removing any FRU, turn off the computer, unplug all power cords from electrical outlets,

disable the built-in battery, and then disconnect any interconnecting cables.

Attention:

• After replacing a FRU, do not turn on the computer until you have made sure that all screws, springs, and

other small parts are in place and none are loose inside the computer. Verify this by shaking the computer

gently and listening for rattling sounds. Metallic parts or metal flakes can cause electrical short circuits.

• The system board is sensitive to, and can be damaged by, electrostatic discharge (ESD). Before touching

it, establish personal grounding by touching a ground point with one hand or by using an electrostatic

discharge strap.

Before servicing the computer

Carefully read this topic before servicing the computer.

Disabling the built-in battery

Before replacing any FRU, ensure that you disable Fast Startup first and then disable the built-in battery.

To disable Fast Startup, do the following:

1. Go to Control Panel, and then change the view of Control Panel from Category to Large icons or Small

icons.

2. Click Power Options, and then click Choose what the power buttons do on the left pane.

3. Click Change settings that are currently unavailable at the top.

4. If prompted by User Account Control (UAC), click Yes.

5. Clear the Turn on fast startup check box, and then click Save changes.

To disable the built-in battery, do the following:

1. Restart your computer. When the logo screen is displayed, immediately press F1 to enter ThinkPad

Setup.

2. Select Config ➙ Power. The Power submenu is displayed.

3. Select Disable built-in battery and press Enter.

4. Select Yes in the Setup Confirmation window. The built-in battery is disabled and the computer turns off

automatically. Wait three to five minutes to let the computer cool.

Removing the nano-SIM card and nano-SIM-card tray

Some models you are servicing might have a nano-SIM card installed. If the computer you are servicing has

a nano-SIM card installed, remove the nano-SIM card and the nano-SIM-card tray before you start the

servicing.

After you finish the servicing, ensure that you install the card and the tray back into the slot firmly.

Removing a major FRU

This section provides instructions on how to remove a major FRU.

62 T480s Hardware Maintenance Manual

1010 Keyboard

Note: You might be instructed to slide the keyboard frame forward or backward in some of the following

steps. In this case, ensure that you do not press or hold the keys while sliding the keyboard frame.

Otherwise, the keyboard frame cannot be moved.

Removal steps of the keyboard

1. Take the tool out of the new keyboard package. Insert the tabs a and b into the slot between the

TrackPoint buttons and the trackpad 1. Slightly pivot the tool downward 2 to release the left and right

TrackPoint buttons. Then remove the two TrackPoint buttons 3.

Note: If the keyboard must be removed to access other FRUs, you need the keyboard removal tool

(product part number: 01LX856) to remove the keyboard. You can purchase the tool as a separate FRU

at: https://support.lenovo.com/partslookup.

a b

2. Loosen the screws that secure the keyboard 4.

Step Screw (quantity) Color Torque

4M2 × 1.65 mm, flat-head, nylon-coated (2) Silver 0.143 Nm

(1.4 kgf-cm)

Chapter 8.Removing or replacing a FRU 63

3. Insert the tabs c and d into the two dents near the two screw heads as shown 5.

c d

4. Pivot the tool in the direction as shown to release the keyboard 6. Push the keyboard in the direction as

shown by arrows 7 to release the latches from the keyboard bezel.

5. Pivot the keyboard slightly upward as shown by arrow 8. Then turn the keyboard over as shown by

arrow 9.

64 T480s Hardware Maintenance Manual

6. Put the keyboard on the palm rest as shown and detach the connectors. Then remove the keyboard.

When installing:

1. Attach the connectors and turn the keyboard over as shown.

Chapter 8.Removing or replacing a FRU 65

2. Insert the keyboard into the keyboard bezel as shown. Ensure that the front edge of the keyboard (the

edge that is close to the display) is under the keyboard bezel.

3. Slide the keyboard in the direction as shown by the arrows. Ensure that the latches are secured under

the keyboard frame.

66 T480s Hardware Maintenance Manual

4. Tighten the screws to secure the keyboard.

5. Take the new TrackPoint buttons out of the new keyboard package. Install the TrackPoint buttons as

shown.

6. Connect the ac power adapter and all cables to the computer.

1020 Base cover assembly

Removal steps of the base cover assembly

Loosen the screws 1 and then remove the base cover assembly 2.

Chapter 8.Removing or replacing a FRU 67

Applying labels to the base cover assembly:

The following illustration shows the location of each label.

1 Asset tag 2 GEO label (for models made in China) or Brazil ANATEL

(WLAN/Bluetooth) label

3 GEO label (for models manufactured in Yonezawa or

assembled in Mexico)

4 Country label

5 IMEI label 6 S/N label

7 Genuine Microsoft label (Windows 10)

68 T480s Hardware Maintenance Manual

1030 Wireless LAN card

Note: This information is only for the user-replaceable modules.

For access, remove this FRU:

• “1020 Base cover assembly” on page 67

Removal steps of the wireless LAN card

Step Screw (quantity) Color Torque

2M2 × 2.2 mm, flat-head, nylon-coated (1) Black 0.181 Nm

(1.85 kgf-cm)

When installing:

Plug the gray cable into the connector labeled MAIN or 2 on the card, and plug the black cable into the

connector labeled AUX or 1 on the card.

1040 Wireless WAN card

For access, remove this FRU:

• “1020 Base cover assembly” on page 67

Chapter 8.Removing or replacing a FRU 69

Removal steps of the wireless WAN card

Step Screw (quantity) Color Torque

3M2 × 2.2 mm, flat-head, nylon-coated (1) Black 0.181 Nm

(1.85 kgf-cm)

When installing:

Plug the orange cable into the connector labeled MAIN on the card; and plug the blue cable into the

connector labeled AUX on the card.

1050 M.2 solid-state drive

For access, remove this FRU:

• “1020 Base cover assembly” on page 67

70 T480s Hardware Maintenance Manual

Removal steps of the M.2 solid-state drive

Step Screw (quantity) Color Torque

1M2 × 2.2 mm, flat-head, nylon-coated (1) Black 0.181 Nm

(1.85 kgf-cm)

1060 Memory module

For access, remove this FRU:

• “1020 Base cover assembly” on page 67

Removal steps of the memory module

When installing:

Chapter 8.Removing or replacing a FRU 71

Insert the notched end of the memory module into the contact edge side of the memory slot. Press the

memory module in firmly, and pivot it downward until it snaps into place. Ensure that the memory module is

firmly installed in the slot and does not move easily.

1070 Ethernet connector drop-down door

For access, remove this FRU:

• “1020 Base cover assembly” on page 67

Removal steps of the Ethernet connector drop-down door

Step Screw (quantity) Color Torque

1M2 × 4 mm, flat-head, nylon-coated (2) Black 0.181 Nm

(1.85 kgf-cm)

When installing:

Ensure that the bracket removed in step 2 is mounted above the Ethernet connector drop-down door.

1080 Thermal fan assembly

For access, remove this FRU:

• “1020 Base cover assembly” on page 67

Removal steps of the thermal fan assembly

Note: Depending on the model, the thermal fan on your computer might look slightly different from the

illustration in this topic.

Loosen the screws 2 in ascending alphabetical order (a to d) as illustrated.

72 T480s Hardware Maintenance Manual

2c 2d

When installing:

• Ensure that the fan connector is attached firmly.

• Do not touch the areas marked a and b in the following illustrations.

1090 USB subcard assembly

For access, remove these FRUs in order:

• “1020 Base cover assembly” on page 67

• “1080 Thermal fan assembly” on page 72

Chapter 8.Removing or replacing a FRU 73

Removal steps of the USB subcard assembly

Step Screw (quantity) Color Torque

6M2 × 2.7 mm, flat-head, nylon-coated (2) Black 0.181 Nm

(1.85 kgf-cm)

When installing:

Ensure that the connector is attached firmly.

1100 Built-in battery

For access, remove this FRU:

• “1020 Base cover assembly” on page 67

74 T480s Hardware Maintenance Manual

Important notices for replacing the battery

Attention: Lenovo has no responsibility for the performance or safety of unauthorized batteries, and

provides no warranties for failures or damage arising out of their use.

Lenovo provides a diagnostic program to do an automatic battery diagnostic test, which can determine if the

removable battery is defective. A removable battery FRU should not be replaced unless this diagnostic test

shows that the battery is defective. The only exception to this is if the battery is physically damaged or a

customer is reporting a possible safety issue.

If no diagnostic program is installed on the computer, the customer should download and install the program

to diagnose the battery, before getting a non-physically damaged battery replaced. Note that the

replacement of a physically damaged battery is not covered by the warranty.

Removal steps of the built-in battery

DANGER

Use only the authorized battery specified for your computer. Any other battery could ignite or

explode.

Step Screw (quantity) Color Torque

1M2 × 4 mm, flat-head, nylon-coated (4) Black 0.181 Nm

(1.85 kgf-cm)

Chapter 8.Removing or replacing a FRU 75

1110 Coin-cell battery

For access, remove these FRUs in order:

• “1020 Base cover assembly” on page 67

• “1100 Built-in battery” on page 74

DANGER

Use only the authorized battery specified for your computer. Any other battery could ignite or

explode.

Removal steps of the coin-cell battery

When installing:

Ensure that the coin-cell battery connector is attached firmly.

1120 Speaker assembly

For access, remove these FRUs:

• “1020 Base cover assembly” on page 67

• “1100 Built-in battery” on page 74

76 T480s Hardware Maintenance Manual

Removal steps of the speaker assembly

Step Screw (quantity) Color Torque

2M2 × 2.3 mm, flat-head, nylon-coated (4) Black 0.181 Nm

(1.85 kgf-cm)

When installing:

• Ensure that the connector is attached firmly.

• Ensure that the cables are routed as shown.

1130 Smart card reader assembly or dummy smart card reader

For access, remove these FRUs in order:

• “1020 Base cover assembly” on page 67

• “1100 Built-in battery” on page 74

• “1120 Speaker assembly” on page 76

Chapter 8.Removing or replacing a FRU 77

Removal steps of the smart card reader assembly

Step Screw (quantity) Color Torque

4M2 × 2.2 mm, flat-head, nylon-coated (2) Black 0.181 Nm

(1.85 kgf-cm)

When installing:

Ensure that the connector is attached firmly.

78 T480s Hardware Maintenance Manual

Removal steps of the dummy smart card reader

Step Screw (quantity) Color Torque

1M2 × 2.2 mm, flat-head, nylon-coated (2) Black 0.181 Nm

(1.85 kgf-cm)

1140 SD card reader and audio subcard assembly

For access, remove these FRUs in order:

• “1020 Base cover assembly” on page 67

• “1100 Built-in battery” on page 74

• “1120 Speaker assembly” on page 76

Chapter 8.Removing or replacing a FRU 79

Removal steps of the SD card reader and audio subcard assembly

Step Screw (quantity) Color Torque

3M2 × 2.7 mm, flat-head, nylon-coated (2) Black 0.181 Nm

(1.85 kgf-cm)

When installing:

Ensure that the connector is attached firmly.

1150 Fingerprint reader and smart card reader cable

For access, remove these FRUs:

• “1020 Base cover assembly” on page 67

• “1100 Built-in battery” on page 74

80 T480s Hardware Maintenance Manual

Removal steps of the fingerprint reader and smart card reader cable

1160 Hall sensor and hall sensor cable

For access, remove these FRUs:

• “1020 Base cover assembly” on page 67

• “1100 Built-in battery” on page 74

Chapter 8.Removing or replacing a FRU 81

Removal steps of the hall sensor and hall sensor cable

Step Screw (quantity) Color Torque

6M2 × 2.7 mm, flat-head, nylon-coated (1) Silver 0.181 Nm

(1.85 kgf-cm)

When installing:

Ensure that the connectors are attached firmly.

1170 Trackpad cable and trackpad

For access, remove these FRUs:

• “1020 Base cover assembly” on page 67

• “1100 Built-in battery” on page 74

82 T480s Hardware Maintenance Manual

Removal steps of the trackpad cable

Chapter 8.Removing or replacing a FRU 83

Removal steps of the trackpad

Step Screw (quantity) Color Torque

3M2 × 2 mm, flat-head, nylon-coated (4) Bronze 0.181 Nm

(1.85 kgf-cm)

1180 NFC cable and NFC module

For access, remove these FRUs:

• “1020 Base cover assembly” on page 67

• “1100 Built-in battery” on page 74

84 T480s Hardware Maintenance Manual

Removal steps of the NFC cable

Removal steps of the NFC module

When installing:

Ensure that the connectors are attached firmly.

1190 System board

Important notices for handling the system board

When handling the system board, read the following:

• The system board has an accelerometer, which can be broken when several thousands of G-forces are

applied.

Note: Dropping a system board from a height of as little as 6 inches so that it falls flat on a hard bench

can subject the accelerometer to as much as 6,000 G's of shock.

Chapter 8.Removing or replacing a FRU 85

• Be careful not to drop the system board on a bench top that has a hard surface, such as metal, wood, or

composite.

• Avoid rough handling of any kind.

• At every point in the process, be sure not to drop or stack the system board.

• If you put a system board down, be sure to put it only on a padded surface such as an ESD mat or a

corrugated conductive material.

For access, remove these FRUs in order:

• “Removing the nano-SIM card and nano-SIM-card tray” on page 62

• “1010 Keyboard” on page 63

Note: The keyboard removal tool (product part number: 01LX856) is needed for removing the keyboard.

You can purchase it as a separate FRU at: https://support.lenovo.com/partslookup.

• “1020 Base cover assembly” on page 67

• “1030 Wireless LAN card” on page 69

• “1040 Wireless WAN card ” on page 69

• “1050 M.2 solid-state drive” on page 70

• “1060 Memory module” on page 71

• “1100 Built-in battery” on page 74

• “1080 Thermal fan assembly” on page 72

• “1070 Ethernet connector drop-down door” on page 72

The following component a CPU soldered on the top side of the system board is extremely sensitive. When

you service the system board, avoid any kind of rough handling.

86 T480s Hardware Maintenance Manual

Removal steps of the system board

Step Screw (quantity) Color Torque

20 M2 × 4 mm, flat head, nylon-coated (1) Black 0.181 Nm

(1.85 kgf-cm)

Chapter 8.Removing or replacing a FRU 87

Step Screw (quantity) Color Torque

22 M2 × 2.5 mm, flat head, nylon-coated (4) Silver 0.181 Nm

(1.85 kgf-cm)

When installing:

Ensure that the connectors are attached firmly.

1200 dc-in cable and power button card

For access, remove these FRUs:

• “Removing the nano-SIM card and nano-SIM-card tray” on page 62

• “1010 Keyboard” on page 63

Note: The keyboard removal tool (product part number: 01LX856) is needed for removing the keyboard.

You can purchase it as a separate FRU at: https://support.lenovo.com/partslookup.

• “1020 Base cover assembly” on page 67

• “1030 Wireless LAN card” on page 69

• “1040 Wireless WAN card ” on page 69

• “1050 M.2 solid-state drive” on page 70

• “1060 Memory module” on page 71

• “1070 Ethernet connector drop-down door” on page 72

• “1080 Thermal fan assembly” on page 72

• “1100 Built-in battery” on page 74

• “1190 System board” on page 85

88 T480s Hardware Maintenance Manual

Removal steps of the dc-in cable and power button card

Step Screw (quantity) Color Torque

4M2 × 2.7 mm, flat-head, nylon-coated (1) Black 0.181 Nm

(1.85 kgf-cm)

When installing:

Ensure that the connectors are attached firmly.

1210 LCD unit

For access, remove this FRU:

• “1020 Base cover assembly” on page 67

Chapter 8.Removing or replacing a FRU 89

Removal steps of the LCD unit

When installing:

Ensure that the connectors are attached firmly.

90 T480s Hardware Maintenance Manual

Step Screw (quantity) Color Torque

9M 2.5 × 4.5 mm, flat-head, nylon-coated (6) Silver 0.294 Nm

(3.0 kgf-cm)

Chapter 8.Removing or replacing a FRU 91

When installing:

Ensure that you route the cables correctly and firmly.

Attention: When you route the cables, ensure that they are not subject to any tension. Tension could cause

the cables to be damaged by the cable guides, or a wire to be broken.

1220 Keyboard bezel assembly

For access, remove these FRUs in order:

• “Removing the nano-SIM card and nano-SIM-card tray” on page 62

• “1010 Keyboard” on page 63

Note: The keyboard removal tool (product part number: 01LX856) is needed for removing the keyboard.

You can purchase it as a separate FRU at: https://support.lenovo.com/partslookup.

• “1020 Base cover assembly” on page 67

• “1030 Wireless LAN card” on page 69

• “1040 Wireless WAN card ” on page 69

• “1050 M.2 solid-state drive” on page 70

• “1060 Memory module” on page 71

• “1070 Ethernet connector drop-down door” on page 72

• “1080 Thermal fan assembly” on page 72

• “1090 USB subcard assembly” on page 73

• “1100 Built-in battery” on page 74

• “1110 Coin-cell battery” on page 76

• “1120 Speaker assembly” on page 76

• “1130 Smart card reader assembly or dummy smart card reader” on page 77

• “1140 SD card reader and audio subcard assembly” on page 79

• “1150 Fingerprint reader and smart card reader cable” on page 80

• “1160 Hall sensor and hall sensor cable” on page 81

• “1170 Trackpad cable and trackpad” on page 82

• “1180 NFC cable and NFC module” on page 84

• “1190 System board” on page 85

• “1200 dc-in cable and power button card” on page 88

• “1210 LCD unit” on page 89

92 T480s Hardware Maintenance Manual

Removing an LCD FRU

This section provides instructions on how to remove an LCD FRU.

2010 LCD bezel sheet and LCD bezel

For access, remove these FRUs in order:

• “1020 Base cover assembly” on page 67

• “1210 LCD unit” on page 89

Removal steps of the LCD bezel sheet and LCD bezel

When installing:

• Ensure that all the latches are attached firmly.

• Ensure that a new LCD bezel sheet is used. Install a new LCD bezel sheet whenever the old one is

removed.

• Due to degradation of adhesive on the LCD bezel sheet, it is recommended that the LCD bezel also be

ordered for machines that are three years or older.

2020 LCD panel and LCD cable assembly

For access, remove these FRUs in order:

• “1020 Base cover assembly” on page 67

• “1210 LCD unit” on page 89

• “2010 LCD bezel sheet and LCD bezel” on page 93

Chapter 8.Removing or replacing a FRU 93

Removal steps of the LCD panel and LCD cable assembly

Step Screw (quantity) Color Torque

1M2 × 2.2 mm, flat-head, nylon-coated (4) Black 0.181 Nm

(1.85 kgf-cm)

When installing:

Ensure that the LCD connector is attached firmly.

2030 Hinge kit

For access, remove these FRUs in order:

• “1020 Base cover assembly” on page 67

94 T480s Hardware Maintenance Manual

• “1210 LCD unit” on page 89

• “2010 LCD bezel sheet and LCD bezel” on page 93

Removal steps of the hinge kit

Step Screw (quantity) Color Torque

1M2.5 × 2.2 mm, flat-head, nylon-coated (4) Bronze 0.294 Nm

(3.0 kgf-cm)

2040 ThinkShutter, camera card, and LED/camera cable (for models with

only conventional camera)

For access, remove these FRUs:

• “1020 Base cover assembly” on page 67

• “1210 LCD unit” on page 89

• “2010 LCD bezel sheet and LCD bezel” on page 93

• “2020 LCD panel and LCD cable assembly” on page 93

• “2030 Hinge kit” on page 94

Removal step of the ThinkShutter

Chapter 8.Removing or replacing a FRU 95

Removal step of the camera card

96 T480s Hardware Maintenance Manual

Removal step of the LED/camera cable

2050 Camera card and LED/camera cable (for models with infrared

camera)

For access, remove these FRUs:

• “1020 Base cover assembly” on page 67

• “1210 LCD unit” on page 89

• “2010 LCD bezel sheet and LCD bezel” on page 93

• “2020 LCD panel and LCD cable assembly” on page 93

• “2030 Hinge kit” on page 94

Removal step of the camera card

Chapter 8.Removing or replacing a FRU 97

Removal step of the camera cable

2060 Antenna kit

For access, remove these FRUs in order:

• “1020 Base cover assembly” on page 67

• “1210 LCD unit” on page 89

• “2010 LCD bezel sheet and LCD bezel” on page 93

• “2020 LCD panel and LCD cable assembly” on page 93

• “2030 Hinge kit” on page 94

98 T480s Hardware Maintenance Manual

Removal steps of the antenna kit

Attention: As you route the cables, ensure that they are not subject to any tension. Tension could cause the

cables to be damaged by the cable guides, or a wire to be broken.

Antenna locations

Chapter 8.Removing or replacing a FRU 99

a Wireless LAN main antenna (gray)

b Wireless WAN main antenna (orange, available on some models)

c Wireless WAN auxiliary antenna (blue, available on some models)

d Wireless LAN auxiliary antenna (black)

2070 LCD rear cover assembly

For access, remove these FRUs in order:

• “1020 Base cover assembly” on page 67

• “1210 LCD unit” on page 89

• “2010 LCD bezel sheet and LCD bezel” on page 93

• “2020 LCD panel and LCD cable assembly” on page 93

• “2030 Hinge kit” on page 94

• “2040 ThinkShutter, camera card, and LED/camera cable (for models with only conventional camera)” on

page 95

• “2050 Camera card and LED/camera cable (for models with infrared camera)” on page 97

• “2060 Antenna kit” on page 98

100 T480s Hardware Maintenance Manual

Appendix A. 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 applications 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.

This information could include technical inaccuracies or typographical errors. Changes are periodically made

to the information herein; these changes will be incorporated in new editions of the publication. Lenovo may

make improvements and/or changes in the product(s) and/or the program(s) described in this publication at

any time without notice.

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.

Electronic emissions notices

For electronic emission information on Class B digital devices, refer to the corresponding information in the

User Guide.

EU contact: Lenovo, Einsteinova 21, 851 01 Bratislava, Slovakia

Trademarks

The following terms are trademarks of Lenovo in the United States, other countries or both:

Lenovo

Lenovo logo

ThinkPad

ThinkPad logo

TrackPoint

Thunderbolt is a trademark of Intel Corporation or its subsidiaries in the U.S. and/or other countries.

Microsoft, Windows and Windows Server are trademarks of the Microsoft group of companies.

The terms HDMI and HDMI High-Definition Multimedia Interface are trademarks or registered trademarks of

HDMI Licensing LLC in the United States and other countries.

Other company, product, or service names may be the trademarks or service marks of others.

102 T480s Hardware Maintenance Manual

Appendix B. Abbreviation table

The following table lists all abbreviations used in this manual.

Abbreviation Term

BGA Ball Grid Array

CMOS Complementary Metal Oxide Semiconductor

CMV Custom Model Variant

CRC Cyclic redundancy check

CRT Cathode ray tube

CRU Customer Replaceable Unit

CTO Configure To Order

EAIA Enhanced Asset Information Area

EEPROM Electrically Erasable Programmable Read-Only Memory

EFI Extensible Firmware Interface

ESD Electrostatic discharge

FRU Field Replaceable Unit

GAV General Announce Variant

IC Integrated circuits

LCD Liquid Crystal Display

MTM Machine type and model

POST Power-on self-test

RFID Radio-frequency identification

SVP Supervisor password

UUID Universally unique identifier

104 T480s Hardware Maintenance Manual

Part Number: SP40Q51782_01

Printed in

(1P) P/N: SP40Q51782_01

*1PSP40Q51782_01*

Table of Contents

Lenovo T480s User Manual

Related Manuals