Specifications

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 43).
5. Remove the following components:
a. Bluetooth module (see
Bluetooth module on page 47)
b. Hard drive (see
Hard drive on page 49)
c. Optical drive (see
Optical drive on page 51) or upgrade bay device (see Upgrade bay
device on page 52)
d. Keyboard (see
Keyboard on page 57)
e. Switch cover (see
Switch cover on page 66)
f. Display assembly (see
Display assembly on page 77)
g. Top cover (see
Top cover on page 82)
h. Bluetooth module cable (see
Bluetooth module cable on page 87)
i. Speaker (see
Speaker on page 88)
j. Audio/ExpressCard assembly (see
Audio/ExpressCard assembly on page 89)
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 54 and Primary memory module
on page 59)
●
WWAN module (see
WWAN module on page 55)
●
Modem module (see
Modem module on page 61)
92 Chapter 4 Removal and replacement procedures