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 34).
● WLAN module (see WLAN module on page 37).
● WWAN module (see WWAN module on page 38).
● Solid-state drive (see Solid-state drive on page 40).
● Heat sink (see Heat sink on page 54).
Remove the system board:
1. Disconnect the following cables from the system board:
● Power connector cable (1)
● Camera cable (2)
● Antenna cables from the WWAN module (select products only) (3)
● Antenna cables from the WLAN module (4)
● Larger USB cable from the USB board (ZIF) (5)
● Speaker cable (6)
● Small USB cable from the USB board (7)
● Display cable (8)
● Keyboard cable (ZIF) (9)
● Card reader cable (ZIF) (10)
● Touchpad cable (ZIF) (11)
● Keyboard backlight cable (ZIF) (select products only) (12)
● RTC battery cable (13)
● NFC module cable (ZIF) (select products only) (14)
● Fingerprint reader cable (ZIF) (select products only) (15)
Component replacement procedures 57
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