Lenovo ThinkBook 14 2-in-1 G4 IML Hardware Maintenance Manual

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Hardware Maintenance Manual

Lenovo ThinkBook 14 2-in-1 Gen 4

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Summary of Contents for Lenovo ThinkBook 14 2-in-1 G4 IML

Page 1 Hardware Maintenance Manual Lenovo ThinkBook 14 2-in-1 Gen 4...
Page 4 Hardware Maintenance Manual...
Page 5 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 2024...
Page 6 Hardware Maintenance Manual...
Page 7 • 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 2024...
Page 8 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.
Page 9 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.
Page 10 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: •...
Page 11 DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information...
Page 12 Hardware Maintenance Manual...
Page 13 PERIGO PERIGO PERIGO Chapter 1 Safety information...
Page 14 PERIGO PERIGO PERIGO PERIGO PERIGO Hardware Maintenance Manual...
Page 15 DANGER DANGER DANGER DANGER Chapter 1 Safety information...
Page 16 DANGER DANGER DANGER DANGER VORSICHT Hardware Maintenance Manual...
Page 17 VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information...
Page 18 VORSICHT VORSICHT VORSICHT Hardware Maintenance Manual...
Page 19 Chapter 1 Safety information...
Page 20 Hardware Maintenance Manual...
Page 21 Chapter 1 Safety information...
Page 22 Hardware Maintenance Manual...
Page 23 Chapter 1 Safety information...
Page 24 Hardware Maintenance Manual...
Page 25 Chapter 1 Safety information...
Page 26 Hardware Maintenance Manual...
Page 27 • 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 2024...
Page 28 • 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 Type ac power adapter self-service power cord* self-service Lenovo Slim Pen* self-service * for selected models Hardware Maintenance Manual...
Page 29 Chapter 3. Identifying FRUs (CRUs) Locate FRUs and CRUs The exploded illustrations help Lenovo service technicians identify FRUs or CRUs that they may need to replace when servicing a customer’s computer. Figure 1. Exploded view © Copyright Lenovo 2024...
Page 30 Table 1. FRU (CRU) categories FRU (CRU) category LCD cover Camera shutter Camera board EDP cable LCD module Sensor board Touch control cable Upper case assembly Fingerprint sensor board Fingerprint sensor cable I/O board I/O board cable CMOS battery Solid-state drive (SSD) brackets Note: The SSD bracket is used to lock the screw for the 2242 SSD.
Page 31 Table 1. FRU (CRU) categories (continued) FRU (CRU) category ac power adapter Power cord* Lenovo Slim Pen* * for selected models Chapter 3 Identifying FRUs (CRUs)
Page 32 Hardware Maintenance Manual...
Page 33 Chapter 4. Removing an 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. Prepare them before you service the product.
Page 34 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.
Page 35 Figure 2. Area on the heat sink where thermal interface materials should be applied Area on the system board where thermal interface materials are applied The following figure shows the area on the system board where thermal interface materials are applied. Figure 3.
Page 36 1.85 ± 0.15 Step 3. Pry up the latches and remove the lower case. Figure 5. Remove the lower case Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Lower case Hardware Maintenance Manual...
Page 37 Number of screws Torque force (kgf.cm) M2 × L4.5 1.85 ± 0.15 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Battery pack Remove the solid-state drive (SSD), thermal pad, and bracket Make sure the following FRU (or CRU) has been removed.
Page 38 Screw specifications Number of screws Torque force (kgf.cm) M2 × L3 1.85 ± 0.15 Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: Solid-state drive (SSD) SSD thermal pad SSD bracket Hardware Maintenance Manual...
Page 39 Remove the Wi-Fi card Make sure the following FRU (or CRU) has been removed. “Remove the lower case” on page 29 Step 1. Disconnect the battery pack cable from the system board. Attention: Use your fingernail to pull the connector to unplug it. Do not pull the cable. Step 2.
Page 40 Number of screws Torque force (kgf.cm) M2 × L3 1.85 ± 0.15 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Wi-Fi card Remove the heat sink Make sure the following FRU (or CRU) has been removed.
Page 41 Screw specifications Number of screws Torque force (kgf.cm) M2 × L3 1.85 ± 0.15 Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: Foil mylar Heat sink Remove the fan Make sure the following FRUs (or CRUs) have been removed.
Page 42 M2 × L4 1.85 ± 0.15 Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Remove the CMOS battery Make sure the following FRU (or CRU) has been removed. “Remove the lower case” on page 29...
Page 43 Remove the CMOS battery. Figure 15. Remove the CMOS battery Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: CMOS battery Remove the memory module Make sure the following FRU (or CRU) has been removed.
Page 44 Figure 16. Remove the foil mylar from the memory module Step 3. Open the buckles and remove the memories. Figure 17. Open the buckles and remove the memories Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: Foil mylar Memory Remove the speakers Make sure the following FRUs (CRUs) have been removed.
Page 45 Figure 18. Remove the speakers Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Speakers Remove the I/O board Make sure the following FRUs (or CRUs) have been removed. “Remove the lower case” on page 29 “Remove the CMOS battery”...
Page 46 Figure 20. Remove the I/O board Screw specifications Number of screws Torque force (kgf.cm) M2 × L4 1.85 ± 0.15 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: I/O board Hardware Maintenance Manual...
Page 47 Remove the I/O bracket Make sure the following FRU (or CRU) has been removed. “Remove the lower case” on page 29 Step 1. Disconnect the battery pack cable from the system board. Attention: Use your fingernail to pull the connector to unplug it. Do not pull the cable. Step 2.
Page 48 Torque force (kgf.cm) M2 x L4 1.85 ± 0.15 Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Foil mylar I/O bracket Remove the fingerprint sensor board and cable Make sure the following FRUs (or CRUs) have been removed.
Page 49 Screw specifications Number of screws Torque force (kgf.cm) M2 × L3 1.85 ± 0.15 Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: Fingerprint sensor board Fingerprint sensor cable Remove the touchpad cable Make sure the following FRUs (CRUs) have been removed.
Page 50 “Remove the lower case” on page 29 “Remove the battery pack” on page 31 Step 1. Peel off the battery sponge. Figure 25. Peel off the battery sponge Step 2. Lift the keyboard cable. Figure 26. Lift the keyboard cable Step 3.
Page 51 Figure 27. Remove the touchpad cable Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: Battery sponge Touchpad cable Remove the system board and the I/O board cable Make sure the following FRUs (or CRUs) have been removed.
Page 52 Figure 28. Disconnect the cables Step 2. Remove the battery sponge. Remove three screws. Remove the system board with the I/O board cable. Figure 29. Remove the system board with the I/O board cable Screw specifications Number of screws Torque force (kgf.cm) M2 ×...
Page 53 Figure 30. Disconnect the I/O board cable from the system board Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: Battery sponge System board I/O board cable Use a Golden Key U1 tool to flash-write key id information...
Page 54 Figure 31. Disconnect the EDP cable, the touch control cable and the antennas Step 2. Remove seven screws and open the hinges. Figure 32. Open the hinges Screw specifications Number of screws Torque force (kgf.cm) M2.5 × L6 3.0 ± 0.15 M2 ×...
Page 55 Figure 33. Remove the LCD unit Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Acetate tape LCD Self Test When you turn on the computer and the LCD goes black, run LCD Self Test to help you determine whether the LCD functions normally.
Page 56 “Remove the touchpad cable” on page 43 “Remove the system board and the I/O board cable” on page 45 “Remove the LCD unit” on page 47 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Upper case assembly Disassemble the LCD unit Before disassembling the LCD unit, make sure it has been detached from the upper case assembly.
Page 57 Figure 34. Remove the strip cover Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Strip cover Remove the LCD module Make sure the following FRUs (CRUs) have been removed. “Remove the lower case” on page 29 “Remove the LCD unit”...
Page 58 Peel off the tape and the mylar, disconnect the EDP cable from the LCD module, and then remove the LCD module. Figure 37. Remove the LCD module Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: Hardware Maintenance Manual...
Page 59 Number of screws Torque force (kgf.cm) M2.0 × L2.5 3.0 ± 0.15 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Hinges Remove the EDP cable Make sure the following FRUs (CRUs) have been removed.
Page 60 Figure 39. Remove the EDP cable Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: EDP cable Remove the microphone rubber Make sure the following FRUs (CRUs) have been removed. “Remove the lower case” on page 29 “Remove the LCD unit”...
Page 61 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Microphone rubber Remove the sensor board Make sure the following FRUs (CRUs) have been removed. “Remove the lower case” on page 29 “Remove the LCD unit” on page 47 “Remove the strip cover”...
Page 62 Figure 42. Remove the touch control cable Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Touch control cable Remove the camera shutter Make sure the following FRUs (CRUs) have been removed. “Remove the lower case” on page 29 “Remove the LCD unit”...
Page 63 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Camera shutter Remove the camera board Make sure the following FRUs (CRUs) have been removed. “Remove the lower case” on page 29 “Remove the LCD unit” on page 47 “Remove the strip cover”...
Page 64 “Remove the touch control cable” on page 55 “Remove the camera shutter” on page 56 “Remove the camera board” on page 57 Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: LCD cover Hardware Maintenance Manual...
Page 66 Table 3. All base cover labels (for aluminum models) (continued) Label description Applied country/region Label Label dimensions South Africa WL label 20 mm × 10 mm TW vision warning label 70 mm × 10 mm Vietnam Energy label 10 mm × 9 mm GML label 16.1 mm ×...
Page 67 Trademarks LENOVO and the LENOVO logo are trademarks of Lenovo. All other trademarks are the property of their respective owners. © 2024 Lenovo.

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Thinkbook 14 2-in-1 gen 4Thinkbook 14 2-in-1 g4 iml 1Thinkbook 14 2-in-1 g4 iml 221mx000bus