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NOTE: When replacing the system board, be sure that the following components are removed from
the defective system board and installed on the replacement system board:
●
SIM (see
SIM on page 58, if applicable)
●
Memory module (see
Memory module on page 67)
●
WWAN module (see
WWAN module on page 69)
●
WLAN module (see
WLAN module on page 71)
●
Heat sink (see
Heat sink on page 100)
●
Processor (see
Processor on page 104)
Remove the system board:
1. Release the wireless antenna cables (1) from the routing clips (2) attached to the system board.
2.
Disconnect the following cables from the system board:
(3) Display lid switch board cable
(4) Display panel cable
(5) Webcam/microphone module cable
(6) Fingerprint reader cable
(7) RTC battery cable
98 Chapter 4 Removal and replacement procedures