System board
Description
Spare part number
For use only with computer models equipped with WWAN
441097-001
For use only with computer models not equipped with WWAN
441096-001
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:
●
Memory module (see
Memory module on page 43
)
●
WLAN module (see
WLAN module on page 44
)
●
RTC battery (see
RTC battery on page 62
)
●
Bluetooth module (see
Bluetooth module on page 65
)
●
Fan/heat sink assembly (see
Fan/heat sink assembly on page 71
)
●
Processor (see
Processor on page 74
)
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 cord.
4
.
Remove the battery (see
Battery on page 36
).
5
.
Remove the following components:
a
.
Hard drive (see
Hard drive on page 38
)
b
.
Memory module compartment cover (see
Memory module on page 43
)
c
.
Optical drive (see
Optical drive on page 42
)
d
.
Keyboard (see
Keyboard on page 47
)
e
.
Switch cover (see
Switch cover on page 50
)
f
.
Display assembly (see
Display assembly on page 52
)
g
.
Top cover (see
Top cover on page 59
)
h
.
Power switch assembly (see
Power switch assembly on page 63
)
Remove the system board:
1
.
Disconnect the ZIF connector
(1)
to which the audio/infrared board cable is attached and disconnect
the audio/infrared board cable
(2)
from the system board.
2
.
Press in on the ExpressCard slot bezel
(3)
to release the bezel from the ExpressCard slot.
66 Chapter
5
Removal and replacement procedures
ENWW