Filter
Top Products
Heat sink assembly
NOTE: The heat sink assembly includes replacement thermal material. The heat sink fan is
available separately, using spare part number 639460-001.
Description Spare part number
For use in AMD UMA computer models 639463-001
For use in Intel UMA HM55 computer models 637189-001
For use in Intel discrete HM55 computer models 637190-001
For use in AMD discrete computer models 639462-001
Before removing the heat sink assembly, remove the following components:
1. Battery (see
Battery on page 44)
2. Service access cover (see
Service access cover on page 45)
3. Hard drive (See
Hard drive on page 46)
4. Optical drive (see
Optical drive on page 48)
5. WLAN module (see
WLAN module on page 50)
6. Memory module (see
Memory module on page 52)
7. Keyboard (see
Keyboard on page 53)
8. Top cover (see
Top cover on page 56)
9. USB board (see
USB board on page 63)
10. Display assembly (see
Display assembly on page 65)
11. Power connector (see
Power connector on page 64)
12. System board (see
System board on page 72)
Remove the heat sink assembly (heat sink appearance may vary):
NOTE: Steps 1 through 5 apply only to computer models equipped with Intel processors.
1. Position the system board right-side up, with the front toward you.
2. Disconnect the fan cable from the system board (1).
3. Follow the sequence embossed on heat sink to loosen the seven Phillips 10.0×2.0 captive
screws (2) that secure the heat sink assembly to the system board.
NOTE: Due to the adhesive quality of the thermal material located between the heat sink
assembly and system board components, it might be necessary to move the heat sink assembly
from side to side to detach the assembly.
76 Chapter 4 Removal and replacement procedures ENWW