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Before removing the system board, follow these steps:
1. Shut down the computer.
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 35).
5. Remove the keyboard (see
Keyboard on page 39).
6. Remove the top cover (see
Top cover on page 43).
7. Remove the hard drive (see
Hard drive on page 47).
8. Remove the USB board (see
USB board/audio jack on page 50).
9. Remove the WLAN (see
WLAN module on page 51).
After removing 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 59)
●
RTC battery (see
RTC battery on page 62)
● Heat sink (see
Heat sink on page 66)
●
PCH heat sink (see
PCH heat sink on page 65)
●
mSATA solid-state drive (see
mSATA solid-state drive on page 63)
Remove the system board:
NOTE: The heat sink on your system board may appear different from the heat sink shown.
1. Disconnect the following cables from the system board:
●
Display panel cable (1)
●
Speaker cable (2)
●
Fan power connector (3)
56 Chapter 4 Removal and replacement procedures