Description Spare part number
For use only with computer models equipped with an Intel Pentium processor, a graphics subsystem
with discrete video memory, and 512-MB of graphics subsystem memory
646670-001
For use only with computer models equipped with an Intel Pentium processor and a graphics
subsystem with UMA video memory
646669-001
For use only with computer models equipped with an Intel Celeron or Core 2 Duo processor and a
graphics subsystem with UMA video memory
646668-001
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 optical drive (see Optical drive (select models only) on page 44).
6. Remove the WLAN module (see
WLAN module on page 47).
7. Disconnect the hard drive connector cable from the system board (see Hard drive on page 50).
8. Remove the following components:
{
Keyboard (see
Keyboard on page 53)
{
Top cover (see
Top cover on page 56)
{
USB board (see
USB board on page 62)
{
Power connector cable (see
Power connector cable on page 63)
{
Display assembly (see
Display assembly on page 68)
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 49)
{
RTC battery (see RTC battery on page 78)
{
Fan and heat sink (see Fan/heat sink assembly on page 79)
{
Processor (see
Processor on page 86)
Component replacement procedures
75
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