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8. Remove the keyboard (see Keyboard on page 44).
9. Remove the top cover (see
Top cover on page 48).
Remove the power connector cable:
1. Disconnect the power connector cable (1) from the system board.
2. Remove the power connector from the the base enclosure (2).
Reverse this procedure to install the power connector.
System board
Description Spare part number
For use only with computer models equipped with HM76 UMA video memory 680568-001
For use only with computer models equipped with 2048 MB of dedicated discrete video memory 680570-001
For use only with computer models equipped with 1024 MB of dedicated discrete video memory 680569-001
System board thermal pad kit (includes replacement thermal material) 680571-001
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 32).
5. Remove the service door (see
Service door on page 33).
66 Chapter 4 Removal and replacement procedures