Before removing the system board, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and
then unplugging the AC adapter from the computer.
4. Remove the battery (see
Battery on page 44).
5. Remove the following components:
a. Hard drive (see
Hard drive on page 50)
b. Optical drive (see
Optical drive on page 46)
c. Keyboard (see
Keyboard on page 60)
d. Switch cover (see
Switch cover on page 65)
e. Display assembly (see
Display assembly on page 68)
f. Top cover (see
Top cover on page 74)
g. Fan (see
Fan on page 79)
h. Heat sink (see
Heat sink on page 81)
i. Speaker assembly (see
Speaker assembly on page 87)
j. Modem module (see
Modem module on page 63)
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 45)
●
Memory module (see
Memory modules on page 56)
●
WLAN module (see
WLAN module on page 64)
●
WWAN module (see
WWAN module on page 58)
●
Processor (see
Processor on page 84)
●
Graphics card (see
Graphics card on page 85)
●
ExpressCard assembly (see
ExpressCard assembly on page 92)
Remove the system board:
1. Position the computer right-side up, with the front toward you.
Component replacement procedures 89
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