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 47
).
5.
Remove the following components:
a.
Hard drive (see
Hard drive on page 51
)
b.
Optical drive (see
Optical drive on page 54
)
c.
Keyboard (see
Keyboard on page 58
)
d.
Fan (see
Fan on page 63
)
e.
Heat sink (see
Heat sink on page 64
)
f.
Switch cover (see
Switch cover on page 75
)
g.
TouchPad (see
TouchPad on page 70
)
h.
Display assembly (see
Display assembly on page 79
)
i.
Top cover (see
Top cover on page 84
)
j.
Speaker assembly (see
Speaker assembly on page 87
)
k.
Modem module (see
Modem module on page 89
)
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 48
)
●
Memory module (see
Memory module on page 56
)
●
WLAN module (see
WLAN module on page 72
)
●
WWAN module (see
WWAN module on page 61
)
●
Processor (see
Processor on page 67
)
●
Graphics card (see
Graphics card on page 68
)
●
PC Card assembly (see
PC Card assembly on page 95
)
Component replacement procedures 91
