About this documentation
Chapter 1. Safety information
Chapter 2. General checkout
- What to do first
- Checking the ac power adapter
Chapter 3. Identifying FRUs (CRUs)
- Locating FRUs and CRUs
- Looking up the FRU information
Chapter 4. Removing a FRU or CRU
Appendix A. Features and connectors
Appendix B. Label locations
Trademarks

Lenovo Y540 User Manual

Displayed below is the user manual for Y540 by Lenovo which is a product in the Notebooks category. This manual has pages.

Related Manuals

Lenovo Y540 Manual

Hardware Maintenance Manual

Legion Y540-15 Series

First Edition (April 2019)

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

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

35F-05925.

Contents

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

Chapter 1. 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. General checkout . . . . . 21

What to do first . . . . . . . . . . . . . . . 21

Checking the ac power adapter . . . . . . . . 22

Chapter 3. Identifying FRUs

(CRUs) . . . . . . . . . . . . . . . . . 23

Locating FRUs and CRUs . . . . . . . . . . . 23

Major FRUs and CRUs . . . . . . . . . . 24

LCD FRUs and CRUs . . . . . . . . . . . 26

Miscellaneous parts . . . . . . . . . . . 27

Looking up the FRU information . . . . . . . . 27

Chapter 4. Removing a FRU or

CRU . . . . . . . . . . . . . . . . . . 29

General guidelines. . . . . . . . . . . . . . 29

Remove the lower case . . . . . . . . . . . . 30

Remove the battery pack . . . . . . . . . . . 31

Remove the coin-cell battery. . . . . . . . . . 32

Remove the Solid State Drive (SSD) . . . . . . . 33

Remove the Hard Disk Drive (HDD) . . . . . . . 35

Remove the memory modules . . . . . . . . . 37

Remove the Wi-Fi card . . . . . . . . . . . . 38

Remove the heat sink . . . . . . . . . . . . 40

Remove the fans . . . . . . . . . . . . . . 40

Remove the I/O board . . . . . . . . . . . . 42

Remove the speakers . . . . . . . . . . . . 43

Remove the system board. . . . . . . . . . . 45

Remove the upper case (with keyboard) . . . . . 47

Disassemble the LCD module . . . . . . . . . 50

Remove the LCD panel . . . . . . . . . . 50

Remove the camera board. . . . . . . . . 52

Appendix A. Features and

connectors . . . . . . . . . . . . . . . 55

Appendix B. Label locations . . . . . 57

Trademarks . . . . . . . . . . . . . . . . . lxi

ii Hardware Maintenance Manual

About this documentation

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

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

available on your computer.

• Depending on the version of operating systems, some user interface instructions might not be applicable

to your computer.

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

documentation of your computer, including this Hardware Maintenance Manual. To get the latest

documentation, go to https://support.lenovo.com.

• This documentation applies to the following product models.

Model name Machine type

Legion Y540-15IRH 81SX

Legion Y540-15IRH-PG0 81SY

• This manual takes Legion Y540-15IRH as an example.

iv Hardware Maintenance Manual

Chapter 1. Safety information

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

Lenovo notebook computer.

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 tool case 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 non-conductive clip, about 8

centimeters (3 inches) from the end.

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

Attention: Metal objects are good electrical conductors.

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

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

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

is worn or defective.

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

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

louvers or cover them with labels or stickers.

Electrical safety

Observe the following rules when working on electrical equipment.

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

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

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

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

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

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

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

• Disconnect all power before:

– Performing a mechanical inspection

– Working near power supplies

– Removing or installing main units

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

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

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

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

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

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

pocket or behind your back.

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

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

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

that tester.

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

metal floor strips and machine frames.

Observe the special safety precautions when you work with very high voltages; Instructions for these

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

voltages.

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

• Do not use worn or broken tools and testers.

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

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

non-grounded 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-Lenovo 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.

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 cathode ray tube (CRT) face or a bulging capacitor

2Hardware Maintenance Manual

• 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: http://

www.lenovo.com/serviceparts-lookup

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-Lenovo alterations. Use good judgment as to the safety of any non-Lenovo

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.

– 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.

Chapter 1.Safety information 3

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

4Hardware Maintenance Manual

DANGER

Chapter 1.Safety information 5

6Hardware Maintenance Manual

PERIGO

Chapter 1.Safety information 7

PERIGO

8Hardware Maintenance Manual

DANGER

Chapter 1.Safety information 9

DANGER

VORSICHT

10 Hardware Maintenance Manual

VORSICHT

Chapter 1.Safety information 11

VORSICHT

12 Hardware Maintenance Manual

Chapter 1.Safety information 13

14 Hardware Maintenance Manual

Chapter 1.Safety information 15

16 Hardware Maintenance Manual

Chapter 1.Safety information 17

18 Hardware Maintenance Manual

Chapter 1.Safety information 19

20 Hardware Maintenance Manual

Chapter 2. General checkout

This chapter contains the following topics:

Before you go to the checkout instructions, ensure that you 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.

• Be extremely careful during such write operations as copying, saving, or formatting. Storage drives in the

computer that you are servicing sequence 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, make sure that the model

of the machine and the FRU part number are correct by referring to the FRU parts list.

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

of reasons that have nothing to do with a hardware defect, such as cosmic radiation, electrostatic discharge, or

software errors. Consider replacing a FRU only when a problem recurs. If you suspect that a FRU is defective, clear

the error log and run the test again. If the error does not recur, do not replace the FRU.

• Be careful not to replace a nondefective FRU.

What to do first

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

form that you attach to it:

1. Name and phone number of service technician

2. Date of service

3. Date on which the machine failed

4. Date of purchase

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

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

7. Failing FRU name and part number

8. Machine type, model number, and serial number

9. Customer's name and address

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

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

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

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

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

by referring to the following list:

The following are not covered under warranty:

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

• Scratched (cosmetic) parts

• Distortion, deformation, or discoloration of the cosmetic parts

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

• Damage caused by liquid spilled into the system

• Damage caused by the improper insertion of a personal-computer card (PC card) or the installation of an

incompatible card

• Improper disc insertion or use of an external optical drive

• Fuses blown by attachment of a non-supported 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 non-warranted 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.

Checking the ac power adapter

If the computer fails only when the ac power adapter is used, refer to the information in this topic to check

the ac power adapter.

If the power-on indicator does not turn on, check the power cord of the ac power adapter for correct

continuity and installation.

To check the ac power adapter, do the following:

1. Unplug the ac power adapter cable from the computer.

2. Measure the output voltage across the plug of the ac power adapter cable. The correct voltages are

shown in the following table.

Pin Voltage (V dc)

1 +20

2 0

3Ground

Note: The output voltage across pin 2 might differ from the voltage that you measure.

3. Depending on the voltage that you measure, do one of the following:

• If the voltage is not correct, replace the ac power adapter.

• If the voltage is acceptable, do the following:

a. Replace the system board.

b. If the problem persists, call the Customer Support Center.

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

22 Hardware Maintenance Manual

Chapter 3. Identifying FRUs (CRUs)

Locating FRUs and CRUs

This topic introduces the following service parts:

“Major FRUs and CRUs” on page 24

“LCD FRUs and CRUs” on page 26

“Miscellaneous parts” on page 27

Notes:

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

• CRU statement for customers:

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

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

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

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

install the CRU according to the warranty service for your product. If you intend on installing the CRU,

Lenovo will ship the CRU to you. CRU information and replacement instructions are shipped with your

product and are available from Lenovo at any time upon request. You can find a list of CRUs for your

product in this Hardware Maintenance Manual. An electronic version of this manual can be found at

https://support.lenovo.com. Click Documentation and then follow the on-screen instructions to find the

manual for your product. 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 CRU

within thirty (30) days of your receipt of the replacement CRU. See your Lenovo Limited Warranty

documentation for full details.

Your 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..

Major FRUs and CRUs

Figure 1. Exploded view

24 Hardware Maintenance Manual

Note: Depending on the computer model, your computer might look different from the illustration above.

Table 1. Major FRUs and CRUs

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

1LCD module - -

2Strip cover No No

3Key-lock bracket Yes No

4Upper case (with keyboard) No No

5Speakers No No

6Wi-Fi card No No

7System board No No

8SSD *No No

SSD bracket *

Memory modules No No

Memory module shielding No No

10 Fans No No

Heat sink No No

11 Battery pack No No

12 Lower case No No

13 I/O board No No

I/O board cable No No

HDD cable *No No

HDD *No No

HDD bracket *No No

15 Coin-cell battery No No

16 AC adapter Yes No

17 Power cord Yes No

* for selected models

Chapter 3.Identifying FRUs (CRUs) 25

LCD FRUs and CRUs

Figure 2. LCD module – exploded view

26 Hardware Maintenance Manual

Table 2. LCD FRUs and CRUs

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

1LCD bezel No No

2LCD panel No No

3Removable tapes No No

4Camera board No No

5LCD cover assembly No No

Miscellaneous parts

Table 3. Miscellaneous parts

FRU descriptions Self-service CRU Optional-service CRU

Screw kit:

• Screw M3.0 x 3.0, silver (4)

• Screw M2.5 x 3.5, silver (8)

• Screw M2.0 x 2.3, black (2)

• Screw M2.5 x 7.0, silver (6)

• Screw M2.0 x 3.5, silver (14)

• Screw M2.0 x 5.0, black (13)

• Screw M2.0 x 3.0, black (4)

• Screw M2.0 x 4.0, black (6)

• Screw M2.0 x 8.0, black (7)

No No

Battery gasket No No

Mylar No No

Hinge cap No No

Camera rubber No No

Thermal pad No No

Looking up the FRU information

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

https://support.lenovo.com/partslookup

Chapter 3.Identifying FRUs (CRUs) 27

28 Hardware Maintenance Manual

Chapter 4. Removing a FRU or CRU

General guidelines

When removing or replacing a FRU, ensure that you 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. 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 procedure. Remove them in the order in which they

are listed.

3. Follow the correct sequence in the steps for removing a FRU, as shown in the illustrations by the

numbers in square callouts.

4. When removing a FRU, move it in the direction as shown by the arrow in the illustration.

5. To install a new FRU in place, perform the removal procedure in reverse and follow any notes that

pertain to replacement.

6. If screws are missing, look up details in “Miscellaneous parts” on page 27 for replacement screws and

order them through the Lenovo CRM system.

7. When replacing the base cover, reapply all labels that come with the replacement base cover. If some

original labels are not included with the replacement base cover, peal them off from the original base

cover and paste them on the replacement base cover.

DANGER

Before removing any FRU or CRU, shut down the computer and unplug all power cords from

electrical outlets.

Attention:

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

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

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

• The system board is sensitive to and can be damaged by ESD. Before touching it, establish personal

grounding by touching a ground point with one hand or by using an ESD strap (P/N 6405959).

Remove the lower case

Make sure the computer has been turned off before servicing the computer.

Step 1. Place the computer upside down on a flat surface. Remove the 11 screws.

Figure 3. Remove the 11 screws

Screw specifications Number of screws

1 M2.0 x 8.0 5

2 M2.0 x 4.0 6

Step 2. Insert a pry tool to separate the lower case from upper case.

Figure 4. Separate the lower case from upper case

Step 3. Remove the lower case.

30 Hardware Maintenance Manual

Figure 5. Remove the lower case

Refer to “Major FRUs and CRUs” on page 24 to look up details about the following replacement part:

Lower case

Remove the battery pack

Make sure the following FRU (or CRU) has been removed.

“Remove the lower case” on page 30

Step 1. Detach the battery pack connector from the system board.

Attention: Use your fingernails to unplug the battery pack connector. Do not pull the cable with

force.

Figure 6. Detach the battery pack connector

Step 2. Remove the 5 screws.

Chapter 4.Removing a FRU or CRU 31

Figure 7. Remove the 5 screws

Screw specifications Number of screws

2 M2.0 x 5.0 5

Step 3. Remove the battery pack.

Figure 8. Remove the battery pack

Refer to “Major FRUs and CRUs” on page 24 to look up details about the following replacement part:

Battery pack

Remove the coin-cell battery

Make sure the following FRUs (or CRUs) have been removed.

“Remove the lower case” on page 30

“Remove the battery pack” on page 31

Step 1. Lift the aluminum foil 1. Then, detach the coin-cell battery connector from the system board 2.

32 Hardware Maintenance Manual

Figure 9. Lift the aluminum foil and detach the connector

Step 2. Remove the coin-cell battery.

Figure 10. Remove the coin-cell battery

Refer to “Major FRUs and CRUs” on page 24 to look up details about the following replacement part:

Coin-cell battery

Remove the Solid State Drive (SSD)

Make sure the following FRUs (or CRUs) have been removed.

“Remove the lower case” on page 30

“Remove the battery pack” on page 31

Notes:

• Only selected models have included the SSD.

• The SSD has two options: 2280 and 2242. Some steps to remove them are slightly different.

Step 1. Remove the screws.

Chapter 4.Removing a FRU or CRU 33

Figure 11. Remove 1 screw (for 2280)

Figure 12. Remove the 2 screws (for 2242)

Screw specifications Number of screws

1 M2.0 x 5 1

2 M2.0 x 3.5 2

Step 2. Remove the SSD bracket.

Note: Only the 2242 SSD includes the bracket.

Figure 13. Remove the SSD bracket

34 Hardware Maintenance Manual

Step 3. Remove the SSD by pulling it away from the slot.

Figure 14. Remove the SSD

Refer to “Major FRUs and CRUs” on page 24 to look up details about the following replacement parts:

SSD

SSD bracket

Remove the Hard Disk Drive (HDD)

Make sure the following FRUs (or CRUs) have been removed.

“Remove the lower case” on page 30

“Remove the battery pack” on page 31

Note: Only selected models have included the HDD.

Step 1. Detach the HDD cable connector from the system board.

Figure 15. Detach the HDD cable connector

Step 2. Remove the 4 screws.

Chapter 4.Removing a FRU or CRU 35

Figure 16. Remove the 4 screws

Screw specifications Number of screws

3 M2.0 x 3.5 4

Step 3. Remove the HDD assembly.

Figure 17. Remove the HDD assembly

Step 4. Remove the HDD cable 5. Then, remove the 4 screws to release the metal frame 6.

36 Hardware Maintenance Manual

Figure 18. Remove the HDD cable and 4 screws

Screw specifications Number of screws

6 M3.0 x 3.0 4

Step 5. Separate HDD from its bracket.

Figure 19. Separate HDD from its bracket

Refer to “Major FRUs and CRUs” on page 24 to look up details about the following replacement parts:

HDD

HDD cable

HDD bracket

Remove the memory modules

Make sure the following FRUs (or CRUs) have been removed.

“Remove the lower case” on page 30

“Remove the battery pack” on page 31

Step 1. Remove the memory module shielding.

Chapter 4.Removing a FRU or CRU 37

Figure 20. Remove the memory module shielding

Step 2. Release the two latches on both edges of the socket at the same time. Then, remove the memory

modules.

2 2

Figure 21. Remove the memory modules

Refer to “Major FRUs and CRUs” on page 24 to look up details about the following replacement parts:

Memory modules

Memory module shielding

Remove the Wi-Fi card

Make sure the following FRUs (or CRUs) have been removed.

“Remove the lower case” on page 30

“Remove the battery pack” on page 31

Step 1. Detach the main and auxiliary antenna connectors.

38 Hardware Maintenance Manual

Figure 22. Detach the connectors

Step 2. Remove the screw.

Figure 23. Remove 1 screw

Screw specifications Number of screws

2 M2.0 x 3.5 1

Step 3. Remove the Wi-Fi card by pulling it away from the slot.

Figure 24. Remove the Wi-Fi card

Chapter 4.Removing a FRU or CRU 39

Refer to “Major FRUs and CRUs” on page 24 to look up details about the following replacement part:

Wi-Fi card

Remove the heat sink

Make sure the following FRUs (or CRUs) have been removed.

“Remove the lower case” on page 30

“Remove the battery pack” on page 31

Step 1. Loosen the 6 screws.

Figure 25. Loosen the 6 screws

Step 2. Remove the heat sink.

Figure 26. Remove the heat sink

Refer to “Major FRUs and CRUs” on page 24 to look up details about the following replacement part:

Heat sink

Remove the fans

Make sure the following FRUs (or CRUs) have been removed.

40 Hardware Maintenance Manual

“Remove the lower case” on page 30

“Remove the battery pack” on page 31

“Remove the heat sink” on page 40

Step 1. Detach the 2 fan connectors.

Figure 27. Detach the 2 connectors

Step 2. Remove the 4 screws.

Figure 28. Remove the 4 screws

Screw specifications Number of screws

2 M2.0 x 5.0 4

Step 3. Remove the 2 fans.

Chapter 4.Removing a FRU or CRU 41

Figure 29. Remove the 2 fans

Refer to “Major FRUs and CRUs” on page 24 to look up details about the following replacement parts:

Fans

Remove the I/O board

Make sure the following FRUs (or CRUs) have been removed.

“Remove the lower case” on page 30

“Remove the battery pack” on page 31

Step 1. Detach the I/O board connector.

Figure 30. Detach the I/O board connector

42 Hardware Maintenance Manual

Step 2. Remove the 2 screws.

Figure 31. Remove the 2 screws

Screw specifications Number of screws

3 M2.0 x 3.5 2

Step 3. Remove the I/O board.

Figure 32. Remove the I/O board

Refer to “Major FRUs and CRUs” on page 24 to look up details about the following replacement part:

I/O board

Remove the speakers

Make sure the following FRUs (CRUs) have been removed.

“Remove the lower case” on page 30

Chapter 4.Removing a FRU or CRU 43

“Remove the battery pack” on page 31

Step 1. Detach the speaker connector from the system board 1. Then, peel off the aluminum foil 2.

Figure 33. Detach the speaker connector and peel off the aluminum foil

Step 2. Remove the 2 screws.

Figure 34. Remove the 2 screws

Screw specifications Number of screws

3 M2.0 x 3 2

Step 3. Release the speaker cable from the cable guides. Then, remove the speakers.

44 Hardware Maintenance Manual

Figure 35. Remove the speakers

Refer to “Major FRUs and CRUs” on page 24 to look up details about the following replacement parts:

Speakers

Remove the system board

Make sure the following FRUs (or CRUs) have been removed.

“Remove the lower case” on page 30

“Remove the battery pack” on page 31

“Remove the Solid State Drive (SSD)” on page 33

“Remove the memory modules” on page 37

“Remove the Wi-Fi card” on page 38

“Remove the heat sink” on page 40

“Remove the fans” on page 40

Step 1. Detach the 6 connectors from the system board as follows:

• HDD connector

• Keyboard connector

• Coin-cell battery connector

• Touchpad button board connector

• Speaker connector

• EDP cable connector

Chapter 4.Removing a FRU or CRU 45

Figure 36. Detach the 6 connectors

Step 2. Remove the 6 screws that secure the system board to the upper case.

Figure 37. Remove the 6 screws

Screw specifications Number of screws

6 M2 x 5.0 3

7 M2 x 3.5 3

Step 3. Remove the key-lock bracket.

46 Hardware Maintenance Manual

Figure 38. Remove the key-lock bracket

Step 4. Lift the system board 9. Then, detach the I/O board connector 10 11 and keyboard backlight

connector 12 13 from the system board.

Figure 39. Remove the system board

Step 5. Carefully remove the system board.

Refer to “Major FRUs and CRUs” on page 24 to look up details about the following replacement parts:

Key-lock bracket

System board

Remove the upper case (with keyboard)

Make sure the following FRUs (CRUs) have been removed.

Chapter 4.Removing a FRU or CRU 47

“Remove the lower case” on page 30

“Remove the battery pack” on page 31

“Remove the coin-cell battery” on page 32

“Remove the Solid State Drive (SSD)” on page 33

“Remove the Hard Disk Drive (HDD)” on page 35

“Remove the memory modules” on page 37

“Remove the Wi-Fi card” on page 38

“Remove the heat sink” on page 40

“Remove the fans” on page 40

“Remove the I/O board” on page 42

“Remove the speakers” on page 43

“Remove the system board” on page 45

Step 1. Push forward the strip cover to remove it.

Figure 40. Remove the strip cover

Step 2. Remove the 2 screws.

48 Hardware Maintenance Manual

Figure 41. Remove the 2 screws

Screw specifications Number of screws

2 M2.5 x 7.0 2

Step 3. Turn over the computer. Then, remove the 6 screws that secure the hinges to the upper case.

Figure 42. Remove the 6 screws

Screw specifications Number of screws

3 M2.0 x 8.0 2

4 M2.5 x 7.0 4

Step 4. Remove the upper case.

Attention: Do not pull out the upper case before detaching the EDP cable connector. Otherwise

the cable may be damaged.

Chapter 4.Removing a FRU or CRU 49

Figure 43. Remove the upper case

Refer to “Major FRUs and CRUs” on page 24 to look up details about the following replacement parts:

Strip cover

Upper case (with keyboard)

Disassemble the LCD module

The LCD module as a whole is not a FRU. Instead, it contains FRUs as its components. Before

disassembling the LCD module, make sure it has been detached from the upper case. Refer to “Remove the

upper case (with keyboard)” on page 47 for instructions.

Remove the LCD panel

Make sure the following FRUs (or CRUs) have been removed.

“Remove the lower case” on page 30

“Remove the battery pack” on page 31

“Remove the upper case (with keyboard)” on page 47

Step 1. Insert a pry piece under the lower inner side of the LCD bezel and then carefully pull the LCD bezel

outwards. Repeat this action along the inner edges of the LCD bezel until all hooks that secure the

LCD bezel are detached.

Note: Be careful to remove the LCD bezel since some adhesive was applied on its mating surface.

If any damage occurs, you shall replace it with a new bezel

50 Hardware Maintenance Manual

Figure 44. Pull the inner sides of the LCD bezel

Step 2. Remove the removable tapes on the left and right.

Note: The removable tapes cannot be reused, so you shall order new tapes after removal.

Figure 45. Remove the removable tapes

Step 3. Lift the LCD panel 3. Then, detach the EDP cable connector 4 5 .

Chapter 4.Removing a FRU or CRU 51

Figure 46. Detach EDP cable connector

Step 4. Carefully remove the LCD panel.

Refer to “LCD FRUs and CRUs” on page 26 to look up details about the following replacement parts:

LCD bezel

Removable tapes

LCD panel

Remove the camera board

Make sure the following FRUs (or CRUs) have been removed.

“Remove the lower case” on page 30

“Remove the battery pack” on page 31

“Remove the upper case (with keyboard)” on page 47

“Remove the LCD panel” on page 50

Step 1. Detach the camera connector.

52 Hardware Maintenance Manual

Figure 47. Detach the camera connector

Step 2. Remove the camera board.

CAUTION:

The camera board is fragile and easily bent. Remove it with great care.

Figure 48. Remove the camera board

Refer to “LCD FRUs and CRUs” on page 26 to look up details about the following replacement part:

Camera board

LCD cover assembly

Chapter 4.Removing a FRU or CRU 53

54 Hardware Maintenance Manual

Appendix A. Features and connectors

1 4 5 6 7 8 9 10 1

Figure 49. Features and connectors

Table 4. Features and connectors

No. Feature or connector

1Ventilation slots (outlet)

2Always On USB 3.1 connector Gen 1

3Audio connector

4USB-C™ connector

5Mini DisplayPort® connector

6USB 3.1 connector Gen 1

7HDMI™ connector

8Ethernet connector

9Power connector

10 Mini security-lock slot

11 Camera

12 Microphones

13 Power button

14 Touchpad

15 Power indicator

16 Novo button

17 USB 3.1 connector Gen 1

56 Hardware Maintenance Manual

Appendix B. Label locations

ab c d

Figure 50. Label layout on the back side of the base cover

Labels attached to the base cover are country/region specific. Make sure to apply the appropriate labels to

the replacement base cover.

Table 5. All base cover labels

Label Label name Applied country/region Label description Label dimensions

aRating label

P.R.China

XXXXXXXXXX

SL10U41183

66 mm x 24 mmIndia

XXXXXXXXX

SL10U41185

Worldwide

XXXXXXXXX

SL10T44899

Table 5. All base cover labels (continued)

bRating print label 144503242 43 mm x 24 mm

cOS label All

HG151000W00

HG151000WA0

SL10F25771

16 mm x 22.5 mm

dAdapter label Argentina

HG0ZF000X00

SL10L20433

HG0ZF000W00

SL10L20428

65 mm x 20 mm

eWL/BT label

Argentina

HG0ZG000300

SL10K92312

HG0ZG000200

SL10K92311

HG17L000200

SL10R02809

HG173000600

SL10P38275

HG15M000200

SL10P20864 35 mm x 15 mm

Brazil

HG0ZF000C00

SL10J78000

HG0ZH000300

SL10K32753

HG17L000600

SL10R02810

HG173000A00

SL10P38280

HG15M000600

SL10P20863

58 Hardware Maintenance Manual

Table 5. All base cover labels (continued)

Taiwan

HG0ZF000800

SL10J77988

HG0ZH000400

SL10L07863

HG17L000100

SL10R02817

HG15M000100

SL10P20862

HG173000500

SL10P38276

Israel

HG0ZF000B00

SL10J77992

HG0ZH000200

SL10K32758

HG17300090

SL10P38279

HG15M000500

SL10P20861

South Africa

HG0ZF000900

SL10J77998

HG10B000400

SL10K32762

HG17L000300

SL10R02811

HG173000800

SL10P38278

HG15M000400

SL10P20865

Country label

KCC label 50 mm x 16 mm

gTaiwan label

HG12M000100

SL10N69882

70 mm x 10 mm

Appendix B. Label locations 59

Table 5. All base cover labels (continued)

hArgentina label 68 mm x 6 mm

iIndonesia label

HG0T1000O00

144503356

32 mm x 10 mm

jIndian BIS label

HG17L000C00

SL10T77984

22 mm x 30 mm

60 Hardware Maintenance Manual

Trademarks

LENOVO and the LENOVO logo are trademarks of Lenovo. Wi-Fi is registered trademark of Wi-Fi Alliance.

USB-C is a trademark of USB Implementers Forum. All other trademarks are the property of their respective

owners. Mini DisplayPort (mDP) is a trademark of the Video Electronics Standards Association. The terms

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

Table of Contents

Lenovo Y540 User Manual

Related Manuals