Table of Contents
- About this manual
- Chapter 1. Safety information
- Chapter 2. General checkout
- Chapter 3. Idetifying FRUs (CRUs)
- Chapter 4. Removing a FRU or CRU
- Appendix A. Label locations
- Trademarks
Lenovo 3 CB User Manual
Displayed below is the user manual for 3 CB by Lenovo which is a product in the Notebooks category. This manual has pages.
Related Manuals
IdeaPad 3 Chromebook (11″, 05), IdeaPad 3
Chromebook (11″, 5) and IdeaPad 3
Chromebook (14″, 05)
Hardware Maintenance Manual
First Edition (March 2020)
© Copyright Lenovo 2020.
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. General checkout . . . . . 21
What to do first . . . . . . . . . . . . . . . 21
CRU list . . . . . . . . . . . . . . . . . . 22
Chapter 3. Idetifying FRUs (CRUs) . . 23
Locate FRU and CRU . . . . . . . . . . . . 23
Chapter 4. Removing a FRU or
CRU . . . . . . . . . . . . . . . . . . 31
Service tools . . . . . . . . . . . . . . . . 31
General guidelines. . . . . . . . . . . . . . 31
Removal procedure for IdeaPad 3 CB 11IGL05 and
IdeaPad 3 CB 11AST5 . . . . . . . . . . . . 32
Remove the lower case . . . . . . . . . . 32
Remove the battery pack . . . . . . . . . 33
Remove the I/O board and the I/O board
cable . . . . . . . . . . . . . . . . . 33
Remove the WLAN card. . . . . . . . . . 35
Remove the system board . . . . . . . . . 36
Remove the LCD module . . . . . . . . . 38
Remove the upper case (with keyboard,
touchpad and speaker) . . . . . . . . . . 38
Disassemble the LCD module . . . . . . . 39
Removal procedure for IdeaPad 3 CB 14IGL05 . . 44
Remove the lower case . . . . . . . . . . 44
Remove the battery pack . . . . . . . . . 45
Remove the I/O board with cable . . . . . . 46
Remove the WLAN card. . . . . . . . . . 48
Remove the system board . . . . . . . . . 49
Remove the speakers. . . . . . . . . . . 51
Remove the thermal pad . . . . . . . . . 52
Remove the upper case . . . . . . . . . . 53
Remove the LCD module . . . . . . . . . 54
Remove the camera . . . . . . . . . . . 57
Remove the hinges. . . . . . . . . . . . 57
Remove the LVDS cable. . . . . . . . . . 59
Appendix A. Label locations. . . . . . 61
Trademarks . . . . . . . . . . . . . . . . lxiii
© Copyright Lenovo 2020 i
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About this manual
This manual contains service and reference information for the following Lenovo products.
Machine Machine type (MT)
IdeaPad 3 CB 11IGL05 82BA
IdeaPad 3 CB 14IGL05 82C1
IdeaPad 3 CB 11AST5 82H4
Important:
• This manual is intended only for trained service technicians who are familiar with Lenovo products.
• Before servicing a Lenovo product, be sure to read all the information under Chapter 1 “Safety
information” on page 1.
© Copyright Lenovo 2020 iii
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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 2020 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
• Mechanical hazards, such as loose or missing hardware
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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
DANGER
DANGER
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PERIGO
PERIGO
PERIGO
PERIGO
PERIGO
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DANGER
DANGER
DANGER
DANGER
VORSICHT
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VORSICHT
VORSICHT
VORSICHT
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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. 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 an 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.
• An 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 an 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
© Copyright Lenovo 2020 21
• 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 unwarranted 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.
CRU list
Table 1. Model: IdeaPad 3 CB 11IGL05 (Machine type: 82BA)
CRU Type
ac power adapter self-service
Power cord self-service
Table 2. Model: IdeaPad 3 CB 14IGL05 (Machine type: 82C1)
CRU Type
ac power adapter self-service
Power cord self-service
Table 3. Model: IdeaPad 3 CB 11AST5 (Machine type: 82H4)
CRU Type
ac power adapter self-service
Power cord self-service
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Chapter 3. Idetifying FRUs (CRUs)
Locate FRU and CRU
The exploded illustrations help Lenovo service technicians identify a FRU or CRU that they may need to
replace when servicing a customer’s computer.
Figure 1. exploded view - IdeaPad 3 CB 11IGL05 and IdeaPad 3 CB 11AST5
© Copyright Lenovo 2020 23
Table 4. FRU (CRU) categories
No. FRU (CRU) category
1Upper case (with keyboard, touchpad and speaker)
2Heat sink
3System board
4WLAN card
5I/O board
6I/O board cable (30P)
7I/O board cable (50P)
8Battery pack
9Lower case
aPower cord
bac power adapter
cScrew kit
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Table 5. FRU (CRU) categories
No. FRU (CRU) category
1LCD bezel
2Strip cover
3LCD panel
4Hinge
5Camera
6LCD cover
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Table 6. FRU (CRU) categories
No. FRU (CRU) category
1Upper case
2Speakers
3WLAN card
4I/O board
5Battery pack
6Lower case
7System board
aPower cord
bac power adapter
cThermal pad
dScrew kit
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Table 7. FRU (CRU) categories
No. FRU (CRU) category
1Camera
2LCD cover
3LCD panel
4LCD bracket
5LCD bezel
6Hinge cover
7Hinge
8LVDS cable
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Chapter 4. Removing a FRU or CRU
Service tools
The following table lists tools for servicing Lenovo computers. Tools with a cross mark are needed for serving
the product models as described by this publication. Gather them before you service the product.
Table 8. Service tools
Service tool and consumable Model applicability
Screw driver (Phillips head) (PH1/PH01) X
Screw driver (Torx head) (T6)
Screw driver (Torx head) (T30)
Pry tool 1 X
Tweezers (conductive) X
Tweezers (isolated)
Suction cup
Hexagonal socket
Silicone grease
Acetate tape
Polyamide tape
Mylar tape
Electrical tape
Double-sided tape
Conductive tape
Eraser
Heat gun
Brown brush
Notes:
• T30 screw drivers are used to service the new Intel Xeon CPUs.
• Hexagonal sockets are used to remove antenna connectors.
• Silicone grease is applied to the CPU and heatsink surfaces to eliminate air gaps.
General guidelines
When removing or replacing an 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 FRU that have to be removed before replacing the failing FRU. Any such FRU are
listed at the beginning of each FRU replacement procedure. Remove them in the order in which they are
listed.
© Copyright Lenovo 2020 31
3. Follow the correct sequence in the steps for removing an FRU, as shown in the illustrations by the
numbers in square callouts.
4. When removing an 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 an FRU, carefully retain and reuse all screws.
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 an 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.
Attention: 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).
Removal procedure for IdeaPad 3 CB 11IGL05 and IdeaPad 3 CB 11AST5
Remove the lower case
Make sure the computer has been shut down before servicing the computer.
Step 1. Place the computer upside down on a flat surface.
Step 2. Remove ten screws.
Figure 5. Remove ten screws
Screw specifications Number of screws
M2 x 5 10
Step 3. Pry up the latches and then remove the lower case.
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Figure 6. Pry up the latches and remove the lower case
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Lower case
Remove the battery pack
Make sure the following FRU (or CRU) have been removed.
“Remove the lower case” on page 32
Step 1. Disconnect the battery cable from the system board.
Attention: Use your fingernail to pull the connector to unplug it. Do not pull the cable.
Step 2. Remove three screws and then remove the battery pack.
Figure 7. Remove three screws and remove the battery pack
Screw specification Number of screws
M2 x 3 3
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Battery pack
Remove the I/O board and the I/O board cable
Make sure the following FRUs (or CRUs) have been removed.
Chapter 4.Removing a FRU or CRU 33
“Remove the lower case” on page 32
“Remove the battery pack” on page 33
Step 1. Disconnect the I/O board cables from the I/O board and the system board. Remove the I/O board
cables.
Figure 8. Remove the I/O board cables
Step 2. Remove three screws.
Figure 9. Remove three screws
Screw specification Number of screws
M2 x 3 3
Step 3. Remove the I/O board.
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Figure 10. Remove the I/O board
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
I/O board
I/O board cable
Remove the WLAN card
Make sure the following FRU (or CRU) have been removed.
“Remove the lower case” on page 32
Step 1. Disconnect the battery cable from the system board.
Attention: Use your fingernail to pull the connector to unplug it. Do not pull the cable.
Step 2. Detach the main and auxiliary antenna cable connectors.
Figure 11. Detach the main and auxiliary antenna cable connectors
Step 3. Remove one screw and then remove the WLAN card by pulling it away from the slot.
Chapter 4.Removing a FRU or CRU 35
Figure 12. Remove one screw and remove the WLAN card
Screw specification Number of screw
M2 x 3 1
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
WLAN card
Remove the system board
Make sure the following FRUs (or CRUs) have been removed.
“Remove the lower case” on page 32
“Remove the battery pack” on page 33
“Remove the WLAN card” on page 35
Step 1. Disconnect cables connected to the system board.
Figure 13. Disconnect cables connected to the system board
Step 2. Remove four screws.
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Figure 14. Remove four screws
Screw specification Number of screws
M2 x 3 4
Step 3. Remove the system board.
Figure 15. Remove the system board
Step 4. Turn over the system board. Remove two screws and then remove the heat sink. (for IdeaPad 3 CB
11AST5 only)
Figure 16. Remove two screws and remove the heat sink
Screw specification Number of screws
M2 x 3 2
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
Heat sink (for IdeaPad 3 CB 11AST5 only)
System board
Chapter 4.Removing a FRU or CRU 37
Remove the LCD module
Make sure the following FRU (or CRU) have been removed.
“Remove the lower case” on page 32
Step 1. Disconnect the battery cable from the system board.
Attention: Use your fingernail to pull the connector to unplug it. Do not pull the cable.
Step 2. Remove four screws.
Figure 17. Remove four screws
Screw specification Number of screws
M2.5 x 5 4
Step 3. Rotate the LCD module to an angle of more than 90 degrees and place the computer on a flat
surface as shown. Remove the LCD module.
Figure 18. Remove the LCD module
Remove the upper case (with keyboard, touchpad and speaker)
Make sure the following FRUs (or CRUs) have been removed.
“Remove the lower case” on page 32
“Remove the battery pack” on page 33
“Remove the I/O board and the I/O board cable” on page 33
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“Remove the WLAN card” on page 35
“Remove the system board” on page 36
“Remove the LCD module” on page 38
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Upper case (with keyboard, touchpad and speaker)
Disassemble the LCD module
The LCD module as a whole is not an FRU. Instead, it contains FRUs as its components. Before
disassembling the LCD module, make sure it has been detached from the upper case.
Remove the LCD bezel
Make sure the following FRU (or CRU) have been removed.
“Remove the LCD module” on page 38
Step 1. Remove the LCD bezel.
Figure 19. Remove the LCD bezel
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
LCD bezel
Remove the strip cover
Make sure the following FRU (or CRU) have been removed.
“Remove the LCD module” on page 38
Step 1. Pull the strip cover to the right side and then remove the strip cover.
Chapter 4.Removing a FRU or CRU 39
Figure 20. Remove the strip cover
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Strip cover
Remove the LCD panel
Make sure the following FRUs (or CRUs) have been removed.
“Remove the LCD module” on page 38
“Remove the LCD bezel” on page 39
“Remove the strip cover” on page 39
Step 1. Remove four screws.
Figure 21. Remove four screws
Screw specification Number of screws
M2 x 2.5 4
Step 2. Remove the LCD panel from the LCD cover and then disconnect the LCD cable from the LCD
panel.
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Figure 22. Remove the LCD panel
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
LCD panel
Remove the camera
Make sure the following FRUs (or CRUs) have been removed.
“Remove the LCD module” on page 38
“Remove the LCD bezel” on page 39
“Remove the strip cover” on page 39
“Remove the LCD panel” on page 40
Step 1. Disconnect the EDP cable from the camera and then remove the camera.
Figure 23. Remove the camera
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Camera
Remove the hinge
Make sure the following FRUs (or CRUs) have been removed.
“Remove the LCD module” on page 38
“Remove the LCD bezel” on page 39
“Remove the strip cover” on page 39
“Remove the LCD panel” on page 40
Chapter 4.Removing a FRU or CRU 41
Step 1. Remove eight screws.
Figure 24. Remove eight screws
Screw specification Number of screws
M2 x 3 6
M2 x 2.5 2
Step 2. Remove the hinge.
Figure 25. Remove the hinge
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
Hinge
Remove the EDP cable
Make sure the following FRUs (or CRUs) have been removed.
“Remove the LCD module” on page 38
“Remove the LCD bezel” on page 39
“Remove the strip cover” on page 39
“Remove the LCD panel” on page 40
Step 1. Remove four screws and then remove the left hinge.
Screw specification Number of screws
M2 x 3 3
M2 x 2.5 1
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Step 2. Disconnect the EDP cable from the camera and then release the EDP cable from the cable guide.
Figure 26. Disconnect the EDP cable from the camera and release the EDP cable from the cable guide
Step 3. Remove the EDP cable.
Figure 27. Remove the EDP cable
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
EDP cable
Remove the LCD cover
Make sure the following FRUs (or CRUs) have been removed.
“Remove the LCD module” on page 38
“Remove the LCD bezel” on page 39
“Remove the strip cover” on page 39
“Remove the LCD panel” on page 40
“Remove the camera” on page 41
“Remove the hinge” on page 41
“Remove the EDP cable” on page 42
Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement
part:
LCD cover
Chapter 4.Removing a FRU or CRU 43
Removal procedure for IdeaPad 3 CB 14IGL05
Remove the lower case
Make sure the computer has been shut down before servicing the computer.
Step 1. Place the computer upside down on a flat surface.
Step 2. Remove ten screws.
Figure 28. Remove ten screws
Screw specification Number of screws
M2 x 5.5 10
Step 3. Pry up the latches and then remove the lower case.
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Figure 29. Pry up the latches and remove the lower case
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement part:
Lower case
Remove the battery pack
Make sure the following FRU (or CRU) have been removed.
“Remove the lower case” on page 44
Step 1. Disconnect the I/O board cable from the system board and the I/O board.
Figure 30. Remove the I/O board cable
Step 2. Disconnect the cable from the system board.
Chapter 4.Removing a FRU or CRU 45
Attention: Use your fingernail to pull the connector to unplug it. Do not pull the cable.
Step 3. Remove four screws and then remove the battery pack.
Figure 31. Remove the battery pack
Screw specification Number of screws
M2 x 4 4
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement part:
Battery pack
Remove the I/O board with cable
Make sure the following FRU (or CRU) have been removed.
“Remove the lower case” on page 44
“Remove the battery pack” on page 45
Step 1. Disconnect the cable of the I/O board from the system board.
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Figure 34. Remove the I/O board
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement part:
I/O board with cable
Remove the WLAN card
Make sure the following FRU (or CRU) have been removed.
“Remove the lower case” on page 44
“Remove the battery pack” on page 45
“Remove the I/O board with cable” on page 46
Step 1. Disconnect the antenna cables from the WLAN card.
Figure 35. Disconnect the antenna cables
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Step 2. Remove one screw and then remove the WLAN card.
Figure 36. Remove one screw and remove the WLAN card
Screw specification Number of screw
M2 x 2.5 1
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement part:
WLAN card
Remove the system board
Make sure the following FRU (or CRU) have been removed.
“Remove the lower case” on page 44
“Remove the battery pack” on page 45
“Remove the I/O board with cable” on page 46
“Remove the WLAN card” on page 48
Step 1. Disconnect cables connected to the system board.
Chapter 4.Removing a FRU or CRU 49
Figure 37. Disconnect cables
Step 2. Remove ten screws.
Figure 38. Remove ten screws
Screw specification Number of screws
M2 x 4 10
Step 3. Remove the system board.
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Figure 39. Remove the system board
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement part:
System board
Remove the speakers
Make sure the following FRU (or CRU) have been removed.
“Remove the lower case” on page 44
“Remove the battery pack” on page 45
Step 1. Disconnect the cable of the speakers from the system board.
Figure 40. Disconnect the cable
Step 2. Carefully remove the speakers.
Chapter 4.Removing a FRU or CRU 51
Figure 41. Remove the speakers
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
Speakers
Remove the thermal pad
Make sure the following FRU (or CRU) have been removed.
“Remove the lower case” on page 44
“Remove the battery pack” on page 45
“Remove the I/O board with cable” on page 46
“Remove the WLAN card” on page 48
“Remove the system board” on page 49
Step 1. Carefully remove the thermal pad.
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Figure 42. Remove the thermal pad
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
Thermal pad
Remove the upper case
Make sure the following FRU (or CRU) have been removed.
“Remove the lower case” on page 44
“Remove the battery pack” on page 45
“Remove the I/O board with cable” on page 46
“Remove the WLAN card” on page 48
“Remove the system board” on page 49
“Remove the speakers” on page 51
“Remove the thermal pad” on page 52
Step 1. Remove six screws.
Chapter 4.Removing a FRU or CRU 53
Figure 43. Remove six screws
Screw specification Number of screws
M2.5 x 4.5 6
Step 2. Remove the upper case.
Figure 44. Remove the upper case
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement part:
Upper case
Remove the LCD module
Make sure the following FRU (or CRU) have been removed.
“Remove the lower case” on page 44
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“Remove the battery pack” on page 45
“Remove the I/O board with cable” on page 46
“Remove the WLAN card” on page 48
“Remove the system board” on page 49
“Remove the speakers” on page 51
“Remove the thermal pad” on page 52
“Remove the upper case” on page 53
Step 1. Remove the LCD bezel.
Figure 45. Remove the LCD bezel
Step 2. Remove the hinge cover.
Figure 46. Remove the hinge cover
Chapter 4.Removing a FRU or CRU 55
Step 3. Remove four screws.
Figure 47. Remove four screws
Screw specification Number of screws
M2 x 2.5 4
Step 4. Remove the LCD panel from the LCD cover and then disconnect the LCD cable.
Figure 48. Remove the LCD panel
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement part:
LCD module
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Remove the camera
Make sure the following FRU (or CRU) have been removed.
“Remove the lower case” on page 44
“Remove the battery pack” on page 45
“Remove the I/O board with cable” on page 46
“Remove the WLAN card” on page 48
“Remove the system board” on page 49
“Remove the speakers” on page 51
“Remove the thermal pad” on page 52
“Remove the upper case” on page 53
“Remove the LCD module” on page 54
Step 1. Disconnect the camera connector and then remove the camera.
Figure 49. Remove the camera
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement part:
Camera
Remove the hinges
Make sure the following FRU (or CRU) have been removed.
“Remove the lower case” on page 44
“Remove the battery pack” on page 45
“Remove the I/O board with cable” on page 46
“Remove the WLAN card” on page 48
“Remove the system board” on page 49
“Remove the speakers” on page 51
Chapter 4.Removing a FRU or CRU 57
“Remove the thermal pad” on page 52
“Remove the upper case” on page 53
“Remove the LCD module” on page 54
Step 1. Remove eight screws.
Figure 50. Remove eight screws
Screw specification Number of screws
M2 x 2.5 8
Step 2. Remove the hinges.
Figure 51. Remove the hinges
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement part:
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Hinge
Remove the LVDS cable
Make sure the following FRU (or CRU) have been removed.
“Remove the lower case” on page 44
“Remove the battery pack” on page 45
“Remove the I/O board with cable” on page 46
“Remove the WLAN card” on page 48
“Remove the system board” on page 49
“Remove the speakers” on page 51
“Remove the thermal pad” on page 52
“Remove the upper case” on page 53
“Remove the LCD module” on page 54
Step 1. Remove the LVDS cable.
Figure 52. Remove the LVDS cable
Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following
replacement parts:
LVDS cable
Chapter 4.Removing a FRU or CRU 59
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Appendix A. Label locations
Figure 53. 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 9. All base cover labels
Label Label name Applied country/ region Label dimensions
aPOD rating label All 100 mm x 30 mm
© Copyright Lenovo 2020 61
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Trademarks
LENOVO and the LENOVO logo are trademarks of Lenovo.
All other trademarks are the property of their respective owners. © 2019 Lenovo.
