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Fan/heat sink assembly
Description Spare part number
UMA heat sink (includes heat sink retention clip and replacement thermal material) 531210-001
Discrete Heat sink (includes heat sink retention clip and replacement thermal material) 531220-001
Before removing the heat sink, 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 47).
5. Remove the following components:
a. Optical drive (see
Optical drive on page 53)
b. Hard drive (see
Hard drive on page 56)
c. Keyboard (see
Keyboard on page 60)
d. Keyboard cover (see
Keyboard cover on page 63)
e. Display assembly (see
Display assembly on page 66)
f. Top cover (see
Top cover on page 72)
g. System board (see
System board on page 76)
Remove the UMA heat sink:
1. Turn the system board upside down.
CAUTION: Loosen the screws in the order indicated on the fan/heat sink assembly to ensure
consistent pressure over the processor board.
2. Loosen the 3 Phillips PM2.0×5.0 captive screws (1) that secure the fan/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 may be necessary to move the heat sink assembly
from side to side to detach the assembly.
Component replacement procedures 81