A SERVICE OF

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c. Optical drive (see Optical drive on page 43)
d. Modem module (see
Modem module on page 69)
e. Keyboard (see
Keyboard on page 56)
f. Top cover (see
Top cover on page 58)
When replacing the system board, be sure to remove the following components from the defective
system board and install on the replacement system board:
●
SIM (see
SIM on page 41)
●
Memory module (see
Memory modules on page 47)
●
WLAN module (see
WLAN/Bluetooth combo card on page 51)
●
WWAN module (see
WWAN module on page 49)
●
Modem module (see
Modem module on page 69)
●
Processor (see
Processor on page 84)
Remove the system board:
1. Position the computer upright with the front toward you.
2. Disconnect the webcam cable (1) and the display cable (2) from the system board, and remove
the cables from the routing clip (3).
3. Remove the Phillips PM2.5×5.0 screw (1) that secures the system board to the base enclosure.
4. Lift the optical drive connector latch (2), and then disconnect the optical drive cable (3).
76 Chapter 4 Removal and replacement procedures