Lenovo IdeaPad C340-14IML, IdeaPad FLEX-14IML Hardware Maintenance Manual [en, ar, bg, cs, da, de, el, es, es, fi, fr, he, hr, hu, id, it, ja, ko, nb, nl, pl, pt, pt, ro, ru, sh, sk, sl, sr, sv, th, tr, uk, zc, zh]

Hardware Maintenance Manual

Lenovo IdeaPad C340-14IML/Lenovo IdeaPad FLEX-14IML

Hardware Maintenance Manual

Lenovo IdeaPad C340-14IML/Lenovo IdeaPad FLEX-14IML

First Edition (August 2019)

© Copyright Lenovo 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. GS­35F-05925.

Contents

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

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

Chapter 4. Removing a FRU or

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

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

Remove the lower case . . . . . . . . . . . . 29

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

Remove the Wi-Fi card . . . . . . . . . . . . 32

Remove the M.2 solid-state drive . . . . . . . . 35

Remove the memory module . . . . . . . . . 37

Remove the fingerprint board . . . . . . . . . 38

Remove the speakers . . . . . . . . . . . . 40

Remove the I/O board . . . . . . . . . . . . 41

Remove the thermal module . . . . . . . . . . 42

Remove the system board. . . . . . . . . . . 44

Remove the dc-in cable. . . . . . . . . . . . 46

Remove the upper case (with keyboard) . . . . . 48

Disassemble the LCD module . . . . . . . . . 49

Remove the LCD panel . . . . . . . . . . 49

Remove the EDP cable, camera board, and

microphone board . . . . . . . . . . . . 51

Remove the hinges. . . . . . . . . . . . 53

Appendix A. Label locations. . . . . . 55

Trademarks . . . . . . . . . . . . . . . . lvii

© Copyright Lenovo 2019 iii

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

© Copyright Lenovo 2019 1

– 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

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• 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:

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.

http://

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

DANGER

DANGER

4 Hardware Maintenance Manual

DANGER

DANGER

DANGER

DANGER

DANGER

Chapter 1. Safety information 5

6 Hardware Maintenance Manual

PERIGO

PERIGO

PERIGO

Chapter 1. Safety information 7

PERIGO

PERIGO

PERIGO

PERIGO

PERIGO

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DANGER

DANGER

DANGER

DANGER

Chapter 1. Safety information 9

DANGER

DANGER

DANGER

DANGER

VORSICHT

10 Hardware Maintenance Manual

VORSICHT

VORSICHT

VORSICHT

VORSICHT

Chapter 1. Safety information 11

VORSICHT

VORSICHT

VORSICHT

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Chapter 1. Safety information 13

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Chapter 1. Safety information 15

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Chapter 1. Safety information 17

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Chapter 1. Safety information 19

20 Hardware Maintenance Manual

Chapter 2. General checkout

This chapter contains the following topics:

“What to do first” on page 21

“Checking the ac power adapter” on page 22

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.

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

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

• 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.

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

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

© Copyright Lenovo 2019 21

• 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

1 +20

2 0

Voltage (V dc)

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.

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Hardware Maintenance Manual

Chapter 3. Identifying FRUs (CRUs)

FRUs (CRUs)

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.

The exploded illustrations help Lenovo service technicians identify FRUs or CRUs that they may need to
replace when servicing a customer’s computer.

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

© Copyright Lenovo 2019 23

a

b

c

d

e

h

g

f

k

m
n

o

p

q

r

l

j

i

Major FRUs (CRUs)

Table 1. Major FRUs (CRUs)

No.

1

2

FRUs (CRUs) description Self-service CRU Optional-service CRU

LCD module

Upper case (with keyboard)

No No

3

System board

24 Hardware Maintenance Manual

No No

Table 1. Major FRUs (CRUs) (continued)

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

Thermal module No No

Memory module No No

Memory module shielding No No

M.2 Solid-state drive (SSD) No No

M.2 2242 Solid-state drive bracket*

ac power adapter Yes No

Power cord* Yes No

Wi-Fi card No No

Wi-Fi card sponge No No

I/O board No No

Fingerprint board No No

Fingerprint board bracket No No

Battery pack No No

Speakers No No

Lower case No No

* for selected models

No No

Chapter 3. Identifying FRUs (CRUs) 25

a

b

d

c

e
f

g

h

i

j

LCD FRUs (CRUs)

Table 2. LCD FRUs (CRUs)

No.

FRUs (CRUs) description Self-service CRU Optional-service CRU

1

2

3

Strip cover No No

LCD panel

Removable tapes No No

26 Hardware Maintenance Manual

No No

Table 2. LCD FRUs (CRUs) (continued)

4

5

6

7

8

9

10

Microphone board No No

Camera board

No No

Camera conductive tape No No

EDP cable No No

Hinges No No

Hinge rubbers No No

LCD cover

No No

Miscellaneous parts

Table 3. Miscellaneous parts

FRUs (CRUs) description Self-service CRU Optional-service CRU

Screw kit

No No

Note: For detailed FRUs 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. When replacing a FRU, carefully retain and reuse all screws. If screws are missing, look up the Lenovo
parts numbers by visiting
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.

https://support.lenovo.com/partslookup for replacement screws and order them

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. Remove the 10 screws.

© Copyright Lenovo 2019 29

1

1

1

1

1

1

1

1

1

1

Figure 1. Remove the 10 screws

2

2

2

2

Screw specifications Number of screws

M2.0 x 6 10

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

Figure 2. Separate the lower case from upper case

Step 3. Remove the lower case.

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3

Figure 3. Remove the lower case

1

Remove the battery pack

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

“Remove the lower case” on page 29

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

Figure 4. Detach the battery pack connector

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

Step 2. Remove the 4 screws.

Chapter 4. Removing a FRU or CRU 31

2

2

2

2

Figure 5. Remove the 4 screws

3

Screw specifications

M2.0 x 3 4

Step 3. Remove the battery pack.

Figure 6. Remove the battery pack

Number of screws

Remove the Wi-Fi card

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

“Remove the lower case” on page 29

“Remove the battery pack” on page 31

Step 1. Detach the I/O board connector from the system board.

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1

2

Figure 7. Detach the I/O board connector

3

Step 2. Peel off the sponge on the Wi-Fi card.

Figure 8. Peel off the sponge

Step 3. Detach the main and auxiliary antenna cable connectors.

Chapter 4. Removing a FRU or CRU 33

4

Figure 9. Detach the connectors

5

Step 4. Remove 1 screw.

Figure 10. Remove 1 screw

Screw specifications

Number of screws

M2.0 x 3 1

Step 5. Remove the Wi-Fi card by pulling it away from the slot.

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6

Figure 11. Remove the Wi-Fi card

1

2

Remove the M.2 solid-state drive

The M.2 solid-state drive has two types: 2242 and 2280. The removal steps are slightly different.

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

“Remove the lower case” on page 29

“Remove the battery pack” on page 31

Step 1. Remove the screws.

Figure 12. Remove the 2 screws (for 2242)

Chapter 4. Removing a FRU or CRU 35

1

Figure 13. Remove 1 screw (for 2280)

3

Screw specifications Number of screws

1 M2.0 x 3 1

2 M2.0 x 2.5 1

Step 2. Remove the M.2 solid-state drive by pulling it away from the slot.

Figure 14. Remove the M.2 solid-state drive

Step 3. Remove the M.2 solid-state drive bracket.

Note: Only the M.2 2242 solid-state drive includes the bracket.

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4

Figure 15. Remove the M.2 solid-state drive bracket

1

Remove the memory module

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

“Remove the lower case” on page 29

“Remove the battery pack” on page 31

Step 1. Remove the memory module shielding.

Figure 16. 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

module.

Chapter 4. Removing a FRU or CRU 37

3

2 2

Figure 17. Remove the memory module

1

Remove the fingerprint board

Note: The fingerprint board is available on selected models.

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

“Remove the lower case” on page 29

“Remove the battery pack” on page 31

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

Step 2. Remove 1 screw.

38

Figure 18. Detach the connector

Hardware Maintenance Manual

2

Figure 19. Remove 1 screw

3

Screw specifications Number of screws

M2.0 x 3 1

Step 3. Remove the fingerprint board bracket.

Figure 20. Remove the fingerprint board bracket

Step 4. Remove the fingerprint board.

Chapter 4. Removing a FRU or CRU 39

4

Figure 21. Remove the fingerprint board

1

Remove the speakers

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

“Remove the lower case” on page 29

“Remove the battery pack” on page 31

Step 1. Detach the speaker connector from the system board.

Figure 22. Detach the connector

Step 2. Release the speaker cable from the cable guides. Then, remove the speakers.

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2

2

Figure 23. Remove the speakers

1

2

Remove the I/O board

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

“Remove the lower case” on page 29

“Remove the battery pack” on page 31

Step 1. Detach the I/O board connector from the system board.

Step 2. Remove the 2 screws.

Figure 24. Detach the I/O board connector

Chapter 4. Removing a FRU or CRU 41

3

3

Figure 25. Remove the 2 screws

4

Screw specifications Number of screws

M2.0 x 3 2

Step 3. Remove the I/O board.

Figure 26. Remove the I/O board

Remove the thermal module

The thermal modules are different for UMA and DIS.

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

“Remove the lower case” on page 29

“Remove the battery pack” on page 31

Step 1. Detach the fan connectors from the system board.

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1

Figure 27. Detach the connectors

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

Step 2. Remove the screws that secure the thermal module to the system board and upper case.

Figure 28. Remove the 8 screws (for UMA)

Figure 29. Remove the 10 screws (for DIS)

Chapter 4. Removing a FRU or CRU 43

Screw specifications Number of screws

3

M2.0 x 3

Step 3. Remove the thermal module.

Figure 30. Remove the thermal module

Remove the system board

8 (for UMA) / 10 (for DIS)

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

“Remove the lower case” on page 29

“Remove the battery pack” on page 31

“Remove the Wi-Fi card” on page 32

“Remove the M.2 solid-state drive” on page 35

“Remove the memory module” on page 37

“Remove the thermal module” on page 42

Step 1. Detach the I/O board connector, keyboard cable connector, fingerprint cable connector, touchpad

cable connector, speakers cable connector, dc-in cable connector and EDP cable connector from
the system board.

Note: The fingerprint cable is available on selected models.

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6

4

3

1

2

5

Figure 31. Detach the connectors

7

8

8

Step 2. Remove 1 screw 7 that secure the system board to upper case. Then, remove the 2 screws 8 that

secure the right hinge to upper case.

Figure 32. Remove the 3 screws

Screw specifications

7 M2.0 x 3 1

8 M2.5 x 4.5 2

Number of screws

Step 3. Open the right hinge.

Chapter 4. Removing a FRU or CRU 45

9

Figure 33. Open the right hinge

10

Step 4. Carefully remove the system board.

Figure 34. Remove the system board

Remove the dc-in cable

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

“Remove the lower case” on page 29

“Remove the battery pack” on page 31

Step 1. Detach the dc-in cable connector from the system board. Then, remove the 2 screws.

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2

2

1

Figure 35. Detach the connector and remove the 2 screws

3

4

Screw specifications Number of screws

M2.5 x 4.5 2

Step 2. Open the right hinge.

Figure 36. Open the right hinge

Step 3. Remove the dc-in cable.

Figure 37. Remove the dc-in cable

Chapter 4. Removing a FRU or CRU 47

Remove the upper case (with keyboard)

1

2

2

2

2

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

“Remove the lower case” on page 29

“Remove the battery pack” on page 31

“Remove the Wi-Fi card” on page 32

Step 1. Detach the EDP cable connector.

Figure 38. Detach the EDP cable connector

Step 2. Remove the 4 screws that secure the hinges to the upper case.

Figure 39. Remove the 4 screws

Screw specifications

M2.5 x 4.5 4

Step 3. Open the hinges.

Number of screws

48

Hardware Maintenance Manual

3

3

Figure 40. Open the hinges

4

Step 4. Slowly and carefully lift up the upper case.

Figure 41. Remove the 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 48 for instructions.

Remove the LCD panel

Step 1. Carefully remove the strip cover.

Chapter 4. Removing a FRU or CRU 49

1

Figure 42. Remove the strip cover

1

1

1

1

2

Step 2. Remove the 4 screws. Then, remove the hinge rubbers that secure the EDP cable and antenna

cables.

Figure 43. Remove the 4 screws and hinge rubbers

Screw specifications

Number of screws

M1.6 x 2 4

Step 3. Pull out the removable tapes with tweezers.

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Hardware Maintenance Manual

3

3

Figure 44. Pull out the removable tapes

4

Step 4. Remove the LCD panel.

Figure 45. Remove the LCD panel

Remove the EDP cable, camera board, and microphone board

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

“Remove the lower case” on page 29

“Remove the battery pack” on page 31

“Remove the upper case (with keyboard)” on page 48

“Remove the LCD panel” on page 49

Step 1. Turn over the LCD panel. Then, detach the touch connector, LCD connector, and microphone

connector.

Chapter 4. Removing a FRU or CRU 51

3

4

1

2

Figure 46. Detach the connectors

5

Step 2. Remove the EDP cable.

Figure 47. Remove the EDP cable

Step 3. Peel off the conductive tape that secures the camera board and microphone board.

52

Hardware Maintenance Manual

6

Figure 48. Peel off the conductive tape

7

8

Step 4. Lift up the camera board and microphone board. Then, detach the camera cable connector from

the microphone board.

Note: The camera board and microphone board are fragile and easily-bent. Take care when
removing the boards.

Figure 49. Remove the camera board and microphone board

Remove the hinges

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

“Remove the lower case” on page 29

“Remove the battery pack” on page 31

“Remove the upper case (with keyboard)” on page 48

“Remove the LCD panel” on page 49

Step 1. Remove the 6 screws.

Chapter 4. Removing a FRU or CRU 53

1

1

1

1

1

1

Figure 50. Remove the 6 screws

2

2

Screw specifications

M2 x 2 6

Step 2. Remove the hinges.

Number of screws

Figure 51. Remove the hinges

54 Hardware Maintenance Manual

Appendix A. Label locations

aa a

b

Figure 52. 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 4. All base cover labels

Label Label description Applied country/region Label dimensions

a

b GML label all country/region

Rating POD label all country/region

100 mm x 30 mm

16 mm x 22.5 mm

© Copyright Lenovo 2019 55

56 Hardware Maintenance Manual

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All other trademarks are the property of their respective owners.