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Description Spare part number
For use only with computer models equipped with an Intel 1.4GHz processor, but not WWAN
capability (includes replacement thermal material)
686088–001
686088–501
686088–601
686090–001
686090–501
686090–601
For use only with computer models equipped with an Intel 1.5Hz processor, but not WWAN
capability (includes replacement thermal material)
693655–001
693655–501
693655–601
693656–001
693656–501
693656–601
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 display panel (see
Display panel on page 31).
5. Remove the base enclosure (see
Base enclosure on page 33).
6. Remove the battery (see
Battery on page 35).
7. Remove the WLAN module (see
WLAN module on page 43).
8. Remove the hard drive (see
Hard drive on page 37).
9. Disconnect the display panel cable from the system board (see
Display panel on page 31).
10. Remove the speaker (see
Speakers on page 58).
11. Remove the power connector and cable (see
Power connector cable on page 57).
12. Remove the USB/Audio and cable (see USB/Audio).
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:
●
RTC battery (see
RTC battery on page 40)
●
Memory module (see
Memory module on page 41)
●
Power connector cable (see
Power connector cable on page 57)
●
Fan (see
Heat sink on page 51)
●
Heat sink (see
Heat sink on page 51)
48 Chapter 4 Removal and replacement procedures