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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