5.
Disconnect the WWAN antenna cables from the WWAN module (see
(select models only) on page
6.
Disconnect the WLAN antenna cables from the WLAN module (see
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
●
WWAN module (see
●
WLAN module (see
●
Memory module (see
●
RTC battery (see
●
Fan/heat sink assembly (see
Remove the system board:
1.
Disconnect the power connector cable from the system board.
2.
Remove the 2 Phillips 2.0×4.0 screws (1) that secure the system board to the base enclosure.
3.
Lift the right side of the system board (2) until it rests at an angle.
62
Chapter 4 Removal and replacement procedures
40).
SIM on page
33)
WWAN and GPS modules (select models only) on page
WLAN module on page
Memory module on page
RTC battery on page
Fan/heat sink assembly on page
42)
44)
45)
WWAN and GPS modules
WLAN module on page
40)
59)
42).