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System board
NOTE: All system board spare part kits include replacement thermal material.
Description Spare part number
For use only with computer models with discrete graphics subsystem memory (includes 256 MB of
graphics subsystem memory
486300-001
For use only with computer models with discrete graphics subsystem memory (includes 128 MB of
graphics subsystem memory
486299-001
For use only with computer models with UMA graphics subsystem memory 486301-001
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 44).
5. Remove the following components:
a. Bluetooth module (see
Bluetooth module on page 48)
b. Hard drive (see
Hard drive on page 50)
c. Optical drive (see
Optical drive on page 52) or upgrade bay device (see Upgrade bay
device on page 53)
d. Keyboard (see
Keyboard on page 58)
e. Switch cover (see
Switch cover on page 67)
f. Display assembly (see
Display assembly on page 78)
g. Top cover (see
Top cover on page 83)
h. Bluetooth module cable (see
Bluetooth module cable on page 88)
i. Speaker (see
Speaker on page 89)
j. Audio/ExpressCard assembly (see
Audio/ExpressCard assembly on page 90)
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
Expansion memory module on page 55 and Primary memory module
on page 60)
●
WWAN module (see
WWAN module on page 56)
●
Modem module (see
Modem module on page 62)
Component replacement procedures 93