Table 5-11 System board descriptions and part numbers (continued)
Description Spare part number
● Intel Core i5-1135G7 processor and NVIDIA GeForce MX450 graphics M16345-xx1
● Intel Core i5-1135G7 processor and NVIDIA GeForce MX350 graphics M16344-xx1
Before removing the system board, follow these steps:
1. Prepare the computer for disassembly (Preparation for disassembly on page 27).
2. Remove the bottom cover (Bottom cover on page 27).
3. Remove the battery (see Battery on page 29).
4. Remove the fan (see Fan on page 37).
When you replace the system board, be sure to remove the following components (as applicable) from the
defective system board and install them on the replacement system board:
● Memory modules (see Memory modules on page 33).
● WLAN module (see WLAN module on page 30).
● Solid-state drive (see Solid-state drive on page 32).
● Heat sink (see Heat sink on page 39).
Remove the system board:
1. Disconnect the following cables from the system board:
● WLAN antennas from the WLAN module (1)
● Power connector (DC-in) board cable (2)
● Display cable (ZIF) (3)
● Speaker cable (4)
● Keyboard cable (ZIF) (5)
● Keyboard backlight cable (ZIF) (6) (select products only)
● Touchpad cable (ZIF) (7)
● USB board cable (ZIF) (8)
● Fingerprint reader cable (ZIF) (9) (select products only)
42 Chapter 5 Removal and replacement procedures for authorized service provider parts
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