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 |