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. Special keys
Chapter 6. Locations
Chapter 7. FRU replacement notices
Chapter 8. Removing or replacing a FRU
Appendix A. Notices
- Electronic emissions notices
- Trademarks

Lenovo X280 User Manual

Displayed below is the user manual for X280 by Lenovo which is a product in the Notebooks category. This manual has pages.

Related Manuals

Lenovo X280 Manual

X280

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.

First Edition (January 2018)

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 an M.2 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 . . . . . . . . . . . . 23

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 battery and operational

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

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

Chapter 4. Related service

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

Recovery information . . . . . . . . . . . . 31

Recovery information for the Windows 10

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

Passwords. . . . . . . . . . . . . . . . . 33

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

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

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

How to remove the power-on password . . . 34

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

Power management . . . . . . . . . . . . . 35

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

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

Symptom-to-FRU index . . . . . . . . . . . 36

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

Error messages . . . . . . . . . . . . . 38

Beep errors. . . . . . . . . . . . . . . 38

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

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

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

Chapter 5. Special keys . . . . . . . . 43

Chapter 6. Locations . . . . . . . . . 45

Computer controls, connectors, and indicators . . 45

Front view . . . . . . . . . . . . . . . 45

Left-side view . . . . . . . . . . . . . . 46

Right-side view . . . . . . . . . . . . . 46

Rear view . . . . . . . . . . . . . . . 46

Bottom view . . . . . . . . . . . . . . 47

Status indicators . . . . . . . . . . . . 47

Locating FRUs and CRUs . . . . . . . . . . . 49

Major FRUs . . . . . . . . . . . . . . 50

LCD FRUs . . . . . . . . . . . . . . . 53

Miscellaneous parts and other FRUs . . . . . 55

Connector and cable guide . . . . . . . . 55

Looking up FRU information . . . . . . . . . . 58

Chapter 7. FRU replacement

notices . . . . . . . . . . . . . . . . . 59

Common service tools . . . . . . . . . . . . 59

Screw notices . . . . . . . . . . . . . . . 59

Retaining serial numbers . . . . . . . . . . . 60

Restoring the serial number of the system

unit . . . . . . . . . . . . . . . . . . 60

Retaining the UUID. . . . . . . . . . . . 61

Reading or writing the ECA information . . . . 62

Chapter 8. Removing or replacing a

FRU. . . . . . . . . . . . . . . . . . . 63

General guidelines. . . . . . . . . . . . . . 63

Before servicing the computer . . . . . . . . . 64

Removing external devices . . . . . . . . 64

Disabling the built-in battery . . . . . . . . 64

Removing the nano-SIM card . . . . . . . 64

Removing the microSD card . . . . . . . . 64

Removing a major FRU . . . . . . . . . . . . 65

1000 Keyboard . . . . . . . . . . . . . 65

1010 Base cover assembly . . . . . . . . 70

1020 M.2 solid-state drive and thermal rubber

for M.2 solid-state drive . . . . . . . . . . 71

1030 Wireless-LAN card . . . . . . . . . 72

1040 Wireless-WAN card . . . . . . . . . 73

1050 Built-in battery . . . . . . . . . . . 74

1060 Thermal fan assembly . . . . . . . . 76

1070 Speaker assembly . . . . . . . . . . 77

1080 Coin-cell battery . . . . . . . . . . 77

1090 Trackpad cable . . . . . . . . . . . 78

1100 Trackpad assembly and trackpad

insulation tape . . . . . . . . . . . . . 79

1110 NFC module with NFC support

bracket . . . . . . . . . . . . . . . . 80

1120 Smart card reader . . . . . . . . . . 81

1130 Nano-SIM-card and microSD-card

tray . . . . . . . . . . . . . . . . . . 82

1140 Fingerprint reader assembly and

fingerprint reader cable . . . . . . . . . . 82

1150 System board assembly and cable

holder . . . . . . . . . . . . . . . . . 83

1160 Side USB connector . . . . . . . . . 85

1170 Power button card and power-button-

card cable . . . . . . . . . . . . . . . 86

1180 LCD unit . . . . . . . . . . . . . 87

1190 Keyboard bezel assembly . . . . . . . 89

Removing an LCD FRU . . . . . . . . . . . . 90

2010 LCD-bezel sheet, ThinkShutter, and

LCD-bezel frame . . . . . . . . . . . . 90

2020 Hinges . . . . . . . . . . . . . . 92

2030 LCD panel assembly and LCD cable. . . 93

2040 Camera/microphone card . . . . . . . 94

2050 Camera/LED cable . . . . . . . . . 96

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

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

Electronic emissions notices . . . . . . . . . . 102

Trademarks . . . . . . . . . . . . . . . . 102

ii X280 Hardware Maintenance Manual

About this manual

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

ThinkPad X280 Machine Types: 20KE and 20KF

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 X280 Hardware Maintenance Manual

Chapter 1. Safety information

This chapter presents following safety information that you must 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 have 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.

2X280 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

4X280 Hardware Maintenance Manual

DANGER

Chapter 1.Safety information 5

6X280 Hardware Maintenance Manual

PERIGO

Chapter 1.Safety information 7

PERIGO

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PERIGO

DANGER

Chapter 1.Safety information 9

DANGER

VORSICHT

10 X280 Hardware Maintenance Manual

VORSICHT

Chapter 1.Safety information 11

VORSICHT

12 X280 Hardware Maintenance Manual

Chapter 1.Safety information 13

14 X280 Hardware Maintenance Manual

Chapter 1.Safety information 15

16 X280 Hardware Maintenance Manual

Chapter 1.Safety information 17

18 X280 Hardware Maintenance Manual

Chapter 1.Safety information 19

20 X280 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 an M.2 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 23

Important:

• Advise customers to contact the Lenovo® Support Web site at http://www.lenovo.com/support to view

the software fixes, download the drivers, and follow the on-screen instructions to install the drivers. For

additional assistance, customers might call the Lenovo Customer Support Center. Telephone numbers for

the Lenovo Support Center are available at:

https://pcsupport.lenovo.com/supportphonelist

• Service training documents for Lenovo authorized service technicians are available at the following Web

site. The disassembly and reassembly videos that show the FRU removal and replacement procedures

are contained in the documents.

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 an M.2 solid-state drive

Always try to run a low-level format before replacing an M.2 solid-state drive (SSD). This will cause all

customer data on the M.2 SSD 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

damage 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: 20A7CTO1WW).

Special-bid model

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

machine type model (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: 20A7000955). 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:

20A70009UK).

22 X280 Hardware Maintenance Manual

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 hard disk 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.

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 X280 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 various 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 hard disk drive. If the spindle of a hard disk drive becomes noisy, the hard

disk 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.

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

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

support representative.

Lenovo Companion 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.

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 X280 Hardware Maintenance Manual

Quick test programs

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

computer does not have the Lenovo Solution Center program 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 gui_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 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 36

for error code descriptions and troubleshooting hints.

2. When the ThinkPad 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 on a USB device or CD.

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.

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 36 for error code descriptions and troubleshooting hints.

Chapter 3.General checkout 27

3. When the ThinkPad 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 36 for error code descriptions and troubleshooting hints.

2. Insert the CD into the external optical drive.

3. Restart the computer.

4. When the ThinkPad 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 and an ac power adapter are 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 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 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 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 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:

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.

28 X280 Hardware Maintenance Manual

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 battery and operational charging

Checking the battery

This system 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.

Checking the operational charging

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. Perform operational charging. Click the battery status icon in the Windows notification area to display

detailed battery information. If it indicates that the battery is not charging, replace the battery.

3. Check the battery status 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 64.

2. Remove the coin-cell battery. See “1150 System board assembly and cable holder” on page 83.

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 X280 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 33

• “Power management” on page 35

• “Symptom-to-FRU index” on page 36

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

This section provides information about recovery solutions. There are various methods to choose from when

considering how to recover in the event of a software- or hardware-related problem. Recovery methods vary

depending on the type of operating system that is installed. Ensure that you follow the correct recovery

procedures.

Recovery information for the Windows 10 operating system

This topic 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, refer to the corresponding information in the topic Chapter 3 “General

checkout” on page 25 to try to solve the problem by yourself. If you still 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.

32 X280 Hardware Maintenance Manual

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.

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 34.

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 hard disk 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 hard disk drive. The hard disk 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.

Chapter 4.Related service information 33

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 and disconnect ac power.

2. Disable the built-in battery. See “Disabling the built-in battery” on page 64.

3. Remove the base cover assembly. See “1010 Base cover assembly” on page 70.

4. Remove the internal battery pack. See “1050 Built-in battery” on page 74.

5. Remove the coin-cell battery. See “1080 Coin-cell battery” on page 77.

6. Reinstall the coin-cell battery.

7. Reinstall the internal battery pack.

8. Reinstall the base cover assembly.

9. Reconnect ac power.

10. 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 ThinkPad 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. The power-on password has been

removed.

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 passwords, or to recover data from the hard disk drive. To put the

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

replace the hard disk drive (HDD) or SSD 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 ThinkPad logo comes up, immediately press F1 to enter the ThinkPad Setup program. When

the power-on password icon is displayed on the screen, enter either the power-on password or the

supervisor password.

3. When the user hard disk password icon is displayed on the screen, press F1. The master hard disk

password icon is displayed.

4. Enter the master hard disk password to enter the ThinkPad Setup program.

5. Select Security.

6. Select Password.

34 X280 Hardware Maintenance Manual

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

8. Select Master hard disk password.

9. 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.

10. 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 three power management modes: screen blank, sleep, and

hibernation.

Sleep mode

When the computer enters sleep mode, the following events occur in addition to what occurs in screen blank

mode:

• The LCD is powered off.

• The storage drive is powered off.

• The microprocessor stops.

To enter sleep mode, press Fn+4 or do the following:

• For Windows 7: Open the Start menu, then click the arrow next to the Shut down button. Click Sleep

from the menu displayed.

• For Windows 10: Open the Start menu, click Power, and then click Sleep.

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

To resume the computer from sleep mode, press the power button.

Also, in either of the following events, the computer automatically returns from sleep mode and resumes

operation:

• The ring indicator (RI) is signaled by a serial device or a PC Card device.

• The time set on the resume timer elapses.

Note: The computer does not accept any input immediately after it enters sleep mode. Wait a few

seconds before taking any action to reenter operation mode.

Hibernation mode

In hibernation mode, the following occurs:

• The system status, RAM, VRAM, and setup data are stored on the hard disk.

• The system is powered off.

Note: If the computer enters the hibernation mode while it is docked to the docking station, 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.

Chapter 4.Related service information 35

• 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 hard disk drive is read, and system status is restored from the hard

disk drive.

Symptom-to-FRU index

This section contains following information:

• “Numeric error codes” on page 36

• “Error messages” on page 38

• “Beep errors” on page 38

• “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.

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.

System board

0183

Bad CRC of Security Settings in EFI Variable. Enter the

ThinkPad Setup program.

1. Run the ThinkPad Setup program, and then save

current setting by pressing F10.

2. System board

0187

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

0188

Invalid RFID Serialization Information Area. System board

36 X280 Hardware Maintenance Manual

Table 1. Numeric error codes (continued)

Symptom or error FRU or action, in sequence

0189

Invalid RFID configuration information area—The

EEPROM checksum is not correct.

System board

0190

Critical low-battery error

1. Charge the battery.

2. Battery

0191

System Security—Invalid Remote Change requested.

1. Run the ThinkPad Setup program, and then save

current setting by pressing F10.

2. System board

0199

System Security— Security password retry count

exceeded.

1. Run the ThinkPad Setup program, and then save

the current setting by pressing F10.

2. 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 wireless network card.

2. 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.

2100

Detection error on HDD0 (Main HDD)

1. Reseat the hard disk drive.

2. Hard disk drive

3. System board

2101

Detection error on SSD1 (M.2)

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

2. M.2 solid-state drive

3. System board

2102

Detection error on SSD2 (M.2)

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

2. M.2 solid-state drive

3. System board

2110

Read error on HDD0 (Main HDD)

1. Reseat the hard disk drive.

2. Hard disk drive

3. System board

2111

Read error on SSD1 (M.2)

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

2. M.2 solid-state drive

3. System board

2112

Read error on SSD2 (M.2)

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

2. M.2 solid-state drive

3. System board

2200

Machine Type and Serial Number are invalid. System board

2201

Machine UUID is invalid System board

Chapter 4.Related service information 37

Error messages

Table 2. Error messages

Symptom or error FRU or action, in sequence

Fan error 1. Fan

2. Thermal grease

3. System board

Thermal sensing error System board

Bottom cover tamper detection error System board

Error: The non-volatile system UEFI variable storage is

nearly full.

Note:

This error indicates that the operating system or

programs cannot create, modify, or delete data in the

non-volatile system UEFI variable storage due to

insufficient storage space after POST.

The non-volatile system UEFI variable storage is used by

the UEFI BIOS and by the operating system or programs.

This error occurs when the operating system or programs

store large amounts of data in the variable storage. All

data needed for POST, such as BIOS setup settings,

chipset, or platform configuration data, are stored in a

separate UEFI variable storage.

Press F1 after the error message is displayed to enter

ThinkPad Setup. A dialog asks the user for confirmation

to clean up the storage. If the user selects “Yes”, all data

that were created by the operating system or programs

will be deleted except global variables defined by the

Unified Extensible Firmware Interface Specification. If the

user selects “No”, all data will be kept, but the operating

system or programs will not be able to create, modify, or

delete data in the storage.

If this error happens at a service center, Lenovo

authorized service personnel will clean up the non-volatile

system UEFI variable storage using the preceding

solution.

Beep errors

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.

38 X280 Hardware Maintenance Manual

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, and the coin-cell battery (service provider

only). 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 (service

provider only).

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).

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).

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.

Chapter 4.Related service information 39

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 3. 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.

• LCD screen unreadable.

• Characters missing pixels.

• Screen abnormal.

• Wrong color displayed.

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

2. Reseat the 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. Printer, mouse, and other external devices

c. External diskette drive or optical drive

d. Wireless cards

4. Turn on the computer.

5. Determine whether the problem has been solved.

40 X280 Hardware Maintenance Manual

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

Chapter 4.Related service information 41

42 X280 Hardware Maintenance Manual

Chapter 5. Special keys

Your computer has several special keys to help you work more easily and effectively.

1 Windows logo key

Press the Windows logo key to open the Start menu. For information about using the Windows logo key with

other keys, see the help information system of the Windows operating system.

2 3 Fn key and function keys

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.

• + 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.

• 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.

Key combinations

• + : Open the Snipping Tool program.

• Fn+Spacebar: If your computer supports keyboard backlight, press Fn+Spacebar to switch between the

different keyboard backlight status (off, low, or high).

• Fn+B: This key combination has the same function as the Break 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+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+4: Press Fn+4 to put the computer into 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.

44 X280 Hardware Maintenance Manual

Chapter 6. Locations

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

Computer controls, connectors, and indicators

This section introduces hardware features of the computer.

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 TrackPoint® buttons 8 Trackpad

9 NFC mark (available on some models) 10 TrackPoint pointing stick

11 Multi-touch screen (available on some models)

Left-side view

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

3 Ethernet extension connector Gen 2 4 Docking-station connector

5 USB 3.1 connector Gen 1 6 HDMI™ connector

7 Audio connector

Right-side view

1 Smart-card slot (available on some models) 2 Fan louvers

3 Always On USB 3.1 connector Gen 1 4 Mini security-lock slot

Rear view

1 Nano-SIM-card and microSD-card slot

46 X280 Hardware Maintenance Manual

Bottom view

1 Fan louvers 2 Docking-station hook holes

3 Emergency-reset hole 4 Speakers

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 47

Indicator Meaning

1 Caps Lock indicator When this indicator is 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 “Special keys” on page

43.

3 Speaker-mute indicator When this indicator is on, the speakers are muted.

4 Microphone-mute indicator When this indicator is on, the microphones are muted.

5 Camera status indicator When this indicator is 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 quickly: 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.

• Off: The fingerprint reader is not ready for tapping.

• Solid white: The fingerprint reader is ready for tapping.

• Amber, blinking: The fingerprint cannot be

authenticated.

9 ac power status indicator This indicator shows the ac power and battery power

status of the computer.

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

100%)

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

90%)

• Off: not connected to ac power

48 X280 Hardware Maintenance Manual

Locating FRUs and CRUs

This topic introduces the following service parts:

• “Major FRUs” on page 50

• “LCD FRUs” on page 53

• “Miscellaneous parts and other FRUs” on page 55

Notes:

• 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. Click Guides & Manuals and then follow the on-screen instructions to find the

manual for your product. 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 and FRUs:

– 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.

– 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/CRU is available for all types or models, unless otherwise specified.

Chapter 6.Locations 49

Major FRUs

50 X280 Hardware Maintenance Manual

Table 4. Major FRUs and CRUs

No. FRU description Self-service CRU Optional-service CRU

1LCD unit No No

2Trackpad assembly No No

3Keyboard bezel assembly No No

4Power button card and cable (see “Miscellaneous parts

and other FRUs” on page 55)

No No

5Wireless-LAN card Yes No

6Wireless-WAN card*Yes No

7Side USB connector No No

8Thermal fan assembly No No

9Smart card reader*No No

10 Dummy smart card reader*No No

11 Fingerprint reader cable*No No

12 Fingerprint reader bracket*No No

13 Fingerprint reader*No No

14 Base cover assembly Yes No

15 Trackpad cable No No

16 Near field communication (NFC) module*No No

17 NFC support bracket* (see “Miscellaneous parts and other

FRUs” on page 55)

No No

18 Built-in battery No No

19 Speaker assembly No No

20 Cable holder No No

21 System board assembly No No

22 Coin-cell battery No No

23 M.2 solid-state drive Yes No

24 Thermal rubber for M.2 solid-state drive No No

25 Trackpad insulation tape No No

26 Keyboard assembly No Yes

27 TrackPoint pointing stick Yes No

28 Nano-SIM-card and microSD-card tray Yes No

aLenovo factory recovery USB key*Yes No

bPower cord Yes No

cac power adapter Yes No

dMiscellaneous parts kits Yes No

* Available on some models

Chapter 6.Locations 51

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.

52 X280 Hardware Maintenance Manual

LCD FRUs

Table 5. LCD FRUs

No. FRU descriptions Self-service

CRU

Optional-service

CRU

1LCD-bezel sheet No No

2ThinkShutter for conventional camera*No No

Chapter 6.Locations 53

Table 5. LCD FRUs (continued)

No. FRU descriptions Self-service

CRU

Optional-service

CRU

3Dummy camera lens cover*No No

4LCD-bezel frame No No

5Conventional camera/microphone card*No No

6Infrared camera/microphone card*No No

7Camera/LED cable for models with infrared camera*No No

8Camera/LED cable for models with conventional camera*No No

9LCD rear cover assembly No No

10 Hinges No No

11 Antenna kit No No

12 LCD cable No No

13 LCD panel assembly No No

* Available on some models

54 X280 Hardware Maintenance Manual

Miscellaneous parts and other FRUs

FRU descriptions Self-service CRU Optional-service CRU

Screw and tape kit

• M2.5 x L4.0 (12)

• M2.0 x L5.0 (12)

• M2.0 x L3.2 (8)

• M2.0 x L2.8 (14)

• M2.0 x L2.2, big flat head (6)

• M2.0 x L2.2, step screw (8)

• M2.5 x L2.5 (8)

• M2F x L1.8 (8)

• M2.0 x L2.6, big flat head (8)

• Tape (3)

No No

Miscellaneous kit

• Microphone rubber on camera card (1)

• Spacer rubber for models without microphones (1)

• Foam for infrared camera card (1)

• Washer for infrared camera (1)

• Power button card (1)

• Power button card cable (1)

• Ethernet extension connector Gen 2 cover (1)

• NFC support bracket (1)

No No

Label kit No No

Keyboard removal tool No No

Connector and cable guide

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

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

FRUs” on page 50 and “LCD FRUs” on page 53.

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

System board connectors and cables

Chapter 6.Locations 55

No. Connector/feature Internal cable required Cable connection

1Thermal fan connector (internal) Thermal fan assembly cable The thermal fan assembly comes

with a cable. Connect the cable to

this connector.

2Power button connector (internal) Power-button-card cable Connect one end to the power

button card and the other end to

this connector.

3Camera/LED connector (internal) Camera/LED cable Connect one end to the camera/

microphone card and the other

end to this connector.

4Wireless-WAN card slot (internal) No Insert the wireless-WAN card into

this slot.

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

this slot.

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

assembly and the other end to this

connector.

7USB-C connector / power

connector (external)

No Connect USB-C compatible

devices or a USB-C power

adapter to this connector.

8USB-C connector (Thunderbolt 3

compatible) / power connector

(external)

No Connect USB-C compatible

devices or a USB-C power

adapter to this connector.

9Ethernet extension connector Gen

2 (external)

No Connect to a local area network

(LAN) through this connector using

a ThinkPad Ethernet Extension

Adapter Gen 2.

10 USB 3.1 connector Gen 1

(external)

No Connect USB-compatible devices

to this connector.

11 HDMI connector (external) No Connect a compatible digital

audio device or video monitor to

this connector.

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

to this connector.

13 Coin-cell battery connector

(internal)

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

cable. Connect the cable to this

connector.

56 X280 Hardware Maintenance Manual

No. Connector/feature Internal cable required Cable connection

14 Speaker connector (internal) Speaker assembly cable Connect the speaker assembly

cable to this connector.

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

directly to this connector.

16 M.2 solid-state drive slot (internal) No Insert an M.2 solid-state drive

directly into this slot.

17 Trackpad connector (internal) Trackpad cable See “Trackpad cable” on page 57

18 Fingerprint reader connector

(internal)

Fingerprint reader cable See “Fingerprint cable” on page

19 Nano-SIM-card and microSD-card

slot (external)

No Insert a nano-SIM card or microSD

card into this slot.

20 TrackPoint pointing stick

connector (internal)

TrackPoint pointing stick cable The keyboard comes with a

TrackPoint pointing stick cable.

Connect the cable to this

connector.

21 Keyboard connector (internal) Keyboard cable The keyboard comes with a

keyboard cable. Connect the

cable to this connector.

Trackpad cable

No. Connector (location) Internal cable required Cable connection

Trackpad connector Trackpad cable Connect the end 1 of the cable to

the trackpad connector on the

system board. Connect the end 2

of the cable to the trackpad.

3NFC connector Trackpad cable Connect the end 3 of the cable to

the NFC module.

NFC module connectors and cables

1 2

Chapter 6.Locations 57

No. Connector (location) Internal cable required Cable connection

1NFC module connector (internal) Trackpad cable See “Trackpad cable” on page 57

2NFC antenna connector (internal) NFC antenna kit The trackpad comes with an NFC

antenna kit. Connect the antenna

to this connector.

Fingerprint cable

No. Connector (location) Internal cable required Cable connection

Fingerprint connector Fingerprint cable Connect the end 1 of the cable to

the fingerprint reader connector on

the system board. Connect the

end 3 of the cable to the

fingerprint reader.

2Smart card reader connector Fingerprint cable Connect the end 2 of the cable to

the smart card reader.

Looking up FRU information

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

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

58 X280 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. Click

Guides & Manuals and then follow the on-screen instructions to find the manual for your product. 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.

Common service tools

Below is the list of common service tools that you might need while servicing the computer.

• Screwdriver kit

• 1/4" drive spinner handle

• 1/4" Sq. to 1/4" hex torx adapter

• TR7-TR-10 tamper resistant torx bits

• Removal tool antenna RF connector

• USB 2.0 CD-RW/DVD-ROM combo drive II

• USB cable

• USB Maintenance Key

• USB floppy diskette drive for maintenance diskette

• USB floppy diskette drive tool kit

• Test card for integrated Smart Card

• LENOVO ThinkPad Hardware Maintenance Diskette Version 1.76 or later

Note: Download the file from the following Web site:

https://support.lenovo.com

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 section includes the following descriptions:

• “Restoring the serial number of the system unit” on page 60

• “Retaining the UUID” on page 61

• “Reading or writing the ECA information” on page 62

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 cannot 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.

60 X280 Hardware Maintenance Manual

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 follows:

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.

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.

Chapter 7.FRU replacement notices 61

Reading or writing the ECA information

Information about 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 USB Maintenance Key.

1. Insert the Maintenance Key and 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.

4. 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 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.

1. Insert the Maintenance Key and 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.

4. 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.

62 X280 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 59.

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 drawings by the numbers in

square callouts.

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

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

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,

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

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.

Attention: 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 ESD strap.

Before servicing the computer

Carefully read this topic before servicing the computer.

Removing external devices

Before you start servicing, ensure that you remove all external devices installed by the customer, such as

microSD card, dock, and external display.

Disabling the built-in battery

Before replacing any FRU/CRU, ensure that you 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

If the computer has a nano-SIM card installed, remove the nano-SIM card before you start the servicing.

After you finish the servicing, ensure that you install the nano-SIM card (if available) back into the computer.

Removing the microSD card

If the computer has a microSD card installed, remove the microSD card before you start the servicing.

64 X280 Hardware Maintenance Manual

After you finish the servicing, ensure that you install the microSD card (if available) back into the computer.

Removing a major FRU

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

1000 Keyboard

Removal steps of the keyboard

1. Take the keyboard removal 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

Chapter 8.Removing or replacing a FRU 65

2. Loosen the screws that secure the keyboard.

Step Screw (quantity) Color Torque

4M2×L1.65 mm (Fine pitch), Flat-head,bit#0,Nylon-coated (2) Silver 0.143Nm

(1.4kgf-cm)

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

c d

66 X280 Hardware Maintenance Manual

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

shown by arrow 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.

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

Chapter 8.Removing or replacing a FRU 67

Installing the keyboard

1. Attach the connectors as shown.

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

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

68 X280 Hardware Maintenance Manual

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

the keyboard frame.

4. Tighten the screws to secure the keyboard.

Step Screw (quantity) Color Torque

4M2×L1.65 mm (Fine pitch), Flat-head,bit#0,Nylon-coated (2) Silver 0.143Nm

(1.4kgf-cm)

Chapter 8.Removing or replacing a FRU 69

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

as shown.

1010 Base cover assembly

Removal steps of the base cover assembly

Step Screw (quantity) Color Torque

1M2×L4.4 mm, flat-head, nylon-coated (5) Black 1.85-2.0 kgf-cm

Applying labels to the base cover:

The following illustration shows the location of each label.

70 X280 Hardware Maintenance Manual

1 GEO label 2 Certificate of Authenticity label

3 Genuine Microsoft label 4 IMEI label

5 S/N label 6 Asset Tag

7 Country label

1020 M.2 solid-state drive and thermal rubber for M.2 solid-state drive

For access, remove this FRU:

• “1010 Base cover assembly” on page 70

Attention:

• Do not drop the drive or apply any physical shock to it. The drive is sensitive to physical shock. Improper

handling can cause damage and permanent loss of data.

• Before removing the drive, have the user make a backup copy of all the information on it if possible.

• Never remove the drive while the system is operating or in sleep mode.

Chapter 8.Removing or replacing a FRU 71

Removal steps of the M.2 solid-state drive and thermal rubber for M.2 solid-state drive

Step Screw (quantity) Color Torque

1M2 × L2.2 mm, flat-head, nylon-coated (1) Black 0.181 Nm

(1.85 kgf-cm)

1030 Wireless-LAN card

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

For access, remove this FRU:

• “1010 Base cover assembly” on page 70

72 X280 Hardware Maintenance Manual

Removal steps of the wireless-LAN card

Step Screw (quantity) Color Torque

2M2 × L2.2 mm, flat-head, nylon-coated (1) Black 0.181 Nm

(1.85 kgf-cm)

When installing: Plug the gray cable into the main connector and the black cable into the auxiliary

connector.

1040 Wireless-WAN card

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

For access, remove this FRU:

• “1010 Base cover assembly” on page 70

Chapter 8.Removing or replacing a FRU 73

Removal steps of the wireless-WAN card

Step Screw (quantity) Color Torque

2M2 × L2.2 mm, flat-head, nylon-coated (1) Black 0.181 Nm

(1.85 kgf-cm)

When installing: Plug the orange cable to the main connector and the blue cable to the auxiliary connector.

1050 Built-in battery

Important notices for replacing a 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.

The Lenovo Solution Center program provides an automatic battery diagnostic test that determines if the

battery is defective. A 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 the Lenovo Solution Center program is not 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.

For access, remove this FRU:

• “1010 Base cover assembly” on page 70

Removal steps of the built-in battery

DANGER

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

explode.

74 X280 Hardware Maintenance Manual

Step Screw (quantity) Color Torque

1M2 × L5 mm, flat-head, nylon-coated (4) Black 0.181 Nm

(1.85 kgf-cm)

Installing the built-in battery

Note: Ensure that the two battery tabs are inserted underneath the system board.

Chapter 8.Removing or replacing a FRU 75

1060 Thermal fan assembly

For access, remove this FRU:

• “1010 Base cover assembly” on page 70

Removal steps of the thermal fan assembly

Note: Loosen the screws 2 in ascending alphabetical order as illustrated.

When installing:

• Do not touch the top and bottom areas marked a in the following illustration.

• Tighten the screws in ascending order by following the number marked beside each screw. Otherwise, the

system board might get damaged.

76 X280 Hardware Maintenance Manual

1070 Speaker assembly

For access, remove this FRU:

• “1010 Base cover assembly” on page 70

• “1050 Built-in battery” on page 74

Removal steps of the speaker assembly

Step Screw (quantity) Color Torque

4M2.0 × L2.2 mm, step screw, nylon-coated (4) Black 0.181 Nm

(1.85 kgf-cm)

When installing:

Straighten the speaker cable. Correctly route and secure the cable through the cable guides on the keyboard

bezel assembly and the cable guide rubber on the system board. Secure the extra cable under the system

board. Ensure that the cable is not pinched by any components.

1080 Coin-cell battery

For access, remove this FRU:

Chapter 8.Removing or replacing a FRU 77

• “1010 Base cover assembly” on page 70

• “1050 Built-in battery” on page 74

Removal steps of the coin-cell battery

1090 Trackpad cable

For access, remove these FRUs in order:

• “1010 Base cover assembly” on page 70

• “1050 Built-in battery” on page 74

Removal steps of the trackpad cable

78 X280 Hardware Maintenance Manual

1100 Trackpad assembly and trackpad insulation tape

For access, remove this FRU:

• “1010 Base cover assembly” on page 70

• “1050 Built-in battery” on page 74

Removal steps of the trackpad assembly and trackpad insulation tape

Chapter 8.Removing or replacing a FRU 79

Step Screw (quantity) Color Torque

6M2 × L1.8 mm (fine-pitch), flat-head, bit#0, nylon-coated (4) Silver 0.181 Nm

(1.85 kgf-cm)

1110 NFC module with NFC support bracket

For access, remove this FRU:

• “1010 Base cover assembly” on page 70

• “1050 Built-in battery” on page 74

80 X280 Hardware Maintenance Manual

Removal steps of the NFC module with NFC support bracket

When installing:

Correctly route the NFC antenna cable and fix the cable to the keyboard bezel assembly with a tape. Ensure

that the cable is not pinched by the built-in battery.

1120 Smart card reader

For access, remove this FRU:

• “1010 Base cover assembly” on page 70

• “1050 Built-in battery” on page 74

Removal steps of the smart card reader

Chapter 8.Removing or replacing a FRU 81

Step Screw (quantity) Color Torque

3M2 × L2.6 mm, big flat-head, nylon-coated (3) Silver 0.181 Nm

(1.85 kgf-cm)

1130 Nano-SIM-card and microSD-card tray

Removal steps of the nano-SIM-card and microSD-card tray

1140 Fingerprint reader assembly and fingerprint reader cable

For access, remove this FRU:

• “1010 Base cover assembly” on page 70

• “1050 Built-in battery” on page 74

82 X280 Hardware Maintenance Manual

Removal steps of the Fingerprint reader assembly and fingerprint reader cable

Step Screw (quantity) Color Torque

5M2 × L2.6 mm, big flat-head, nylon-coated (1) Black 0.181 Nm

(1.85 kgf-cm)

1150 System board assembly and cable holder

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 six inches so that it falls flat on a hard bench

can subject the accelerometer to as much as 6000 G's of shock.

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

composite.

Chapter 8.Removing or replacing a FRU 83

• 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:

• “1000 Keyboard” on page 65

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.

• “1010 Base cover assembly” on page 70

• “1020 M.2 solid-state drive and thermal rubber for M.2 solid-state drive” on page 71

• “1030 Wireless-LAN card” on page 72

• “1040 Wireless-WAN card” on page 73

• “1050 Built-in battery” on page 74

• “1060 Thermal fan assembly” on page 76

• “1130 Nano-SIM-card and microSD-card tray” on page 82

Attention: The microprocessor soldered on the system board is extremely sensitive. When you service the

system board, avoid any kind of rough handling.

Removal steps of the system board assembly and cable holder

84 X280 Hardware Maintenance Manual

Step Screw (quantity) Color Torque

12 M2.0 × L5.0 mm, flat-head, nylon-coated (2) Black 0.181 Nm

(1.85 kgf-cm)

14 M2.0 × L2.8 mm, flat-head, nylon-coated (6) Silver 0.181 Nm

(1.85 kgf-cm)

15 M2.0 × L3.2 mm, flat-head, nylon-coated (4) Yellow 0.181 Nm

(1.85 kgf-cm)

Attention: To avoid damage, do not bend the system board.

1160 Side USB connector

For access, remove these FRUs in order:

• “1000 Keyboard” on page 65

Chapter 8.Removing or replacing a FRU 85

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.

• “1010 Base cover assembly” on page 70

• “1020 M.2 solid-state drive and thermal rubber for M.2 solid-state drive” on page 71

• “1030 Wireless-LAN card” on page 72

• “1040 Wireless-WAN card” on page 73

• “1050 Built-in battery” on page 74

• “1060 Thermal fan assembly” on page 76

• “1150 System board assembly and cable holder” on page 83

Removal steps of the side USB connector

1170 Power button card and power-button-card cable

For access, remove these FRUs in order:

• “1000 Keyboard” on page 65

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.

• “1010 Base cover assembly” on page 70

• “1020 M.2 solid-state drive and thermal rubber for M.2 solid-state drive” on page 71

• “1030 Wireless-LAN card” on page 72

• “1040 Wireless-WAN card” on page 73

• “1050 Built-in battery” on page 74

• “1060 Thermal fan assembly” on page 76

• “1150 System board assembly and cable holder” on page 83

86 X280 Hardware Maintenance Manual

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

Step Screw (quantity) Color Torque

1M2.0 × L2.8 mm, flat-head, nylon-coated (1) Black 0.181 Nm

(1.85 kgf-cm)

1180 LCD unit

For access, remove these FRUs in order:

• “1010 Base cover assembly” on page 70

Removal steps of the LCD unit

Chapter 8.Removing or replacing a FRU 87

Step Screw (quantity) Color Torque

8M2.5 × L4 mm, flat-head, nylon-coated (6) Black 0.294 Nm

(3.0 kgf-cm)

88 X280 Hardware Maintenance Manual

When installing:

Correctly route and secure the antenna cables, LCD cable, and camera/LED cable through the cable guides

on the keyboard bezel assembly. Fix the camera/LED cable to the system board with a tape. Ensure that the

cables are not pinched by any components.

1190 Keyboard bezel assembly

To remove the keyboard bezel assembly, remove these FRUs in order:

• “1000 Keyboard” on page 65

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.

• “1010 Base cover assembly” on page 70

• “1020 M.2 solid-state drive and thermal rubber for M.2 solid-state drive” on page 71

• “1030 Wireless-LAN card” on page 72

• “1040 Wireless-WAN card” on page 73

Chapter 8.Removing or replacing a FRU 89

• “1050 Built-in battery” on page 74

• “1060 Thermal fan assembly” on page 76

• “1070 Speaker assembly” on page 77

• “1080 Coin-cell battery” on page 77

• “1090 Trackpad cable” on page 78

• “1100 Trackpad assembly and trackpad insulation tape” on page 79

• “1110 NFC module with NFC support bracket” on page 80

• “1120 Smart card reader” on page 81

• “1130 Nano-SIM-card and microSD-card tray” on page 82

• “1140 Fingerprint reader assembly and fingerprint reader cable” on page 82

• “1150 System board assembly and cable holder” on page 83

• “1160 Side USB connector” on page 85

• “1170 Power button card and power-button-card cable” on page 86

• “1180 LCD unit” on page 87

Removing an LCD FRU

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

2010 LCD-bezel sheet, ThinkShutter, and LCD-bezel frame

For access, remove these FRUs in order:

• “1010 Base cover assembly” on page 70

• “1180 LCD unit” on page 87

Removal steps of the LCD-bezel sheet, ThinkShutter, and LCD-bezel frame

90 X280 Hardware Maintenance Manual

When installing:

After the LCD-bezel sheet and LCD-bezel frame are removed, they cannot be used anymore. Use a new

LCD-bezel sheet and LCD-bezel frame for replacement.

Chapter 8.Removing or replacing a FRU 91

2020 Hinges

For access, remove these FRUs in order:

• “1010 Base cover assembly” on page 70

• “1180 LCD unit” on page 87

• “2010 LCD-bezel sheet, ThinkShutter, and LCD-bezel frame” on page 90

92 X280 Hardware Maintenance Manual

Removal steps of the hinges

Step Screw (quantity) Color Torque

1M2.5 × L2.5 mm, big-head, nylon-coated (4) Silver 0.294 Nm

(3.0 kgf-cm)

2030 LCD panel assembly and LCD cable

For access, remove these FRUs in order:

• “1010 Base cover assembly” on page 70

• “1180 LCD unit” on page 87

• “2010 LCD-bezel sheet, ThinkShutter, and LCD-bezel frame” on page 90

• “2020 Hinges” on page 92

Removal steps of the LCD panel assembly and LCD cable

Chapter 8.Removing or replacing a FRU 93

Installing the LCD panel assembly

Remove the release paper from the four alignment rubbers on the computer cover. Then align the edges of

the LCD panel with the rubbers as shown.

Note: Ensure that the edges of the new LCD panel assembly align with the rubbers on the computer cover.

2040 Camera/microphone card

For access, remove these FRUs in order:

• “1010 Base cover assembly” on page 70

• “1180 LCD unit” on page 87

• “2010 LCD-bezel sheet, ThinkShutter, and LCD-bezel frame” on page 90

• “2020 Hinges” on page 92

• “2030 LCD panel assembly and LCD cable” on page 93

94 X280 Hardware Maintenance Manual

Removal steps of the conventional camera/microphone card

Chapter 8.Removing or replacing a FRU 95

Removal steps of the infrared camera/microphone card

2050 Camera/LED cable

For access, remove these FRUs in order:

• “1010 Base cover assembly” on page 70

• “1180 LCD unit” on page 87

• “2010 LCD-bezel sheet, ThinkShutter, and LCD-bezel frame” on page 90

• “2020 Hinges” on page 92

• “2030 LCD panel assembly and LCD cable” on page 93

96 X280 Hardware Maintenance Manual

Removal steps of the traditional camera/LED cable

Chapter 8.Removing or replacing a FRU 97

Removal steps of the infrared camera/LED cable

2060 Antenna kit

For access, remove this FRU:

• “1010 Base cover assembly” on page 70

• “1180 LCD unit” on page 87

• “2010 LCD-bezel sheet, ThinkShutter, and LCD-bezel frame” on page 90

• “2020 Hinges” on page 92

• “2030 LCD panel assembly and LCD cable” on page 93

98 X280 Hardware Maintenance Manual

Removal steps of the antenna kit

When installing:

• For WWAN card: Plug the orange cable into the main connector on the card; plug the blue cable into the

auxiliary connector on the card.

• For WLAN card: Plug the grey cable into the main connector on the card; plug the black cable into the

auxiliary connector on the card.

Antenna locations:

Note: Correctly route and secure the cables through the cable guides on the computer cover as shown.

Ensure that the cables are not subject to any tension or pinched by any components.

Chapter 8.Removing or replacing a FRU 99

a b c d

a Wireless-LAN antenna (auxiliary)

b Wireless-WAN antenna (auxiliary, available on some models)

c Wireless-WAN antenna (main, available on some models)

d Wireless-LAN antenna (main)

100 X280 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 about 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.

Trademarks

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

Lenovo

Lenovo logo

ThinkPad

ThinkPad logo

TrackPoint

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

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

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 X280 Hardware Maintenance Manual

Part Number: SP40P05788

Printed in

(1P) P/N: SP40P05788

*1PSP40P05788*

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