Description Spare part number
For use only with computer models equipped with an HM55 chipset and a graphics subsystem with
512-MB of discrete video memory
636371-001
For use only with computer models equipped with an HM65 chipset and a graphics subsystem with
UMA video memory
636373-001
For use only with computer models equipped with an HM55 chipset and a graphics subsystem with
UMA video memory
636370-001
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), and then remove the following components:
●
Optical drive (see
Optical drive on page 49)
●
Hard drive (see
Hard drive on page 51)
●
WLAN module (see
WLAN module on page 54)
●
Keyboard (see
Keyboard on page 56)
●
Top cover (see
Top cover on page 59)
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 53)
●
RTC battery (see
RTC battery on page 77)
●
Fan and heat sink (see
Fan and heat sink on page 79)
●
Processor (see
Processor on page 84)
Component replacement procedures 73
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