d. Fan (see Fan on page 63)
e. Heat sink (see
Heat sink on page 64)
f. Keyboard (see
Keyboard on page 67)
g. Bottom cover (see
Bottom cover from top cover on page 70)
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 42)
●
Memory module (see
Memory modules on page 55)
●
WLAN module (see
WLAN module on page 59)
●
WWAN module (see
WWAN module on page 57)
●
Modem module (see
Modem module on page 62)
●
Processor (see
Processor on page 66)
Remove the system board:
1. Position the computer right-side up, with the front toward you.
2. Disconnect the following cables from the system board (as necessary):
●
(1): Antenna cables from the rubber clamp
●
(2): Lid sensor board cable
●
(3): Display cable
●
(4): Webcam cable
●
(5): Fingerprint reader cable
●
(6): RTC battery cable
90 Chapter 4 Removal and replacement procedures
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