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System board
Description Spare part number
System board 442875-001
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 32)
●
RTC battery (see
RTC battery on page 34)
●
WLAN module (see
WLAN module on page 35)
●
Fan/heat sink assembly (see
Fan/heat sink assembly on page 58)
●
Processor (see
Processor on page 60)
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 29).
5.
Remove the following components:
a.
Hard drive (see
Hard drive on page 30)
b.
Optical drive (see
Optical drive on page 36)
c.
Switch cover (see
Switch cover on page 38)
d.
Keyboard (see
Keyboard on page 40)
e.
Display assembly (see
Display assembly on page 44)
f.
Top cover (see
Top cover on page 49)
g.
USB/power connector board (see
USB/power connector board on page 53)
Remove the system board:
1. Remove the USB/power connector board cable (1) from the clips in the base enclosure.
Component replacement procedures 55