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 46).
5. Remove the following components:
a. Bottom door (see
Bottom door on page 48).
b.
Hard drive (see
Hard drive on page 51)
c. Optical drive (see
Optical drive on page 49)
d.
Modem module (see
Modem module on page 78)
e. Fan (see
Fan on page 65)
f. Heat sink (see
Heat sink on page 67)
g. Keyboard (see
Keyboard on page 62)
h. Top cover (see
Top cover on page 69)
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 47)
●
Memory module (see
Memory modules on page 53)
●
WLAN module (see
WLAN/Bluetooth combo card on page 57)
●
WWAN module (see
WWAN module on page 55)
●
Modem module (see
Modem module on page 78)
●
Processor (see
Processor on page 68)
Remove the system board:
1. Position the computer upright with the front toward you.
Component replacement procedures
91
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