Specifications

System board
NOTE: All system board spare part kits include the ExpressCard assembly.
NOTE: All system board spare part kits include replacement thermal material.
Description Spare part number
System board includes 128-MB of graphics subsystem memory 490311-001
System board includes 256-MB of graphics subsystem memory 490312-001
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 40).
5. Remove the following components:
a. Hard drive (see
Hard drive on page 41)
b. Optical drive (see
Optical drive on page 47)
c. Keyboard (see
Switch cover and keyboard on page 49)
d. Switch cover (see
Switch cover and keyboard on page 49)
e. Speakers (see
Speakers on page 54)
f. Display assembly (see
Display assembly on page 55)
g. Top cover (see
Top cover on page 60)
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 45)
●
WLAN module (see
WLAN module on page 43)
●
Processor (see
Processor on page 76)
To remove the system board:
1. Remove the four Phillips 4.0-mm screws (1) that secure the optical drive connector board to the
base enclosure.
2. Remove the Torx 6.0-mm screw (2) that secures the system board to the base enclosure.
68 Chapter 4 Removal and replacement procedures