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4. Remove the battery (see Battery on page 31).
5. Remove the following components:
a. Bottom door (see
Bottom door on page 33).
b. Hard drive (see
Hard drive on page 37)
c. Optical drive (see
Optical drive on page 35)
d. Keyboard (see
Keyboard on page 45)
e. Top cover (see
Top cover on page 47)
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 card (see
SIM on page 34)
●
Memory module (see
Memory modules on page 39)
●
WLAN module (see
WLAN/Bluetooth combo card on page 43)
●
WWAN module (see
WWAN module on page 41)
Remove the system board:
1. Position the computer upright with the front toward you.
2. Disconnect the display cable (1), speaker cable (2), and the power cable (3) from the system
board.
3. Remove the Phillips PM2.5×6.0 screw (1) that secures the system board to the base enclosure.
62 Chapter 4 Removal and replacement procedures