user manual

System board
NOTE: The system board spare kit includes replacement thermal material.
Description Spare part number
For use with computers equipped with discrete graphics subsystem memory and 1 GB of dedicated
memory
509450-001
For use with computers equipped with discrete graphics subsystem memory and 512 MB of
dedicated memory
509451-001
For use with computers equipped with UMA graphics subsystem memory 509449-001
For use with computers equipped with SidePort memory 570379-001
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 48).
5. Remove the following components:
a. Hard drive (see
Hard drive on page 57)
b. Optical drive (see
Optical drive on page 51)
c. Switch cover (see
Switch cover and keyboard on page 63)
d. Display assembly (see
Display assembly on page 68)
e. Top cover (see
Top cover on page 80)
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:
●
TV tuner module (see
TV tuner module on page 55)
●
RTC battery (see
RTC battery on page 56)
●
Memory module (see
Memory module on page 53)
●
Bluetooth module (see
Bluetooth module on page 79)
●
WLAN module (see
WLAN module on page 60)
●
Modem module (see
Modem module on page 83)
●
Processor (see
Processor on page 96)
Remove the system board:
1. Disconnect the modem module cable (1) from the modem module.
88 Chapter 4 Removal and replacement procedures