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System board
NOTE: The system board spare part kit includes UMA or discrete graphics subsystem memory and
replacement thermal material.
Description Spare part number
For use in Intel HM55 UMA computer models 639521-001
For use in Intel HM65 UMA computer models 639522-001
For use in Intel HM55 discrete, 512 MB, computer models 639523-001
For use in Intel HM55 discrete, 1 GB, computer models 639524-001
For use in Intel HM65 discrete, 512 MB, computer models 639525-001
For use in Intel HM65 discrete, 1 GB, computer models 639526-001
For use in AMD UMA computer models 640893-001
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 modules (see
Memory module on page 48)
●
WLAN module (see
WLAN module on page 46)
Before removing the system board, remove the following components:
1. Battery (see
Battery on page 40)
2. Service access cover (see
Service access cover on page 41)
3. Hard drive (see
Hard drive on page 42)
4. Optical drive (see
Optical drive on page 44)
5. WLAN module (see
WLAN module on page 46)
6. Memory module (see
Memory module on page 48)
7. Keyboard (see
Keyboard on page 50)
8. Top cover (see
Top cover on page 52)
9. USB board (see
USB board on page 59)
10. Display assembly (see
Display assembly on page 62)
11. Power connector (see
Power connector on page 61)
Remove the optical drive connector board:
1. Turn the computer right-side up, with the front toward you.
2. Remove the three Phillips 4.0 x 2.5 screws (1) that secure the optical drive connector board to
the computer.
ENWW Component replacement procedures 69