Service and Maintain

Heat Sink (Thermal Module)
Description Spare part number
Heat sink (thermal module) 646799-001
The heat sink is secured with three captive screws.
To remove the heat sink:
1. Prepare the computer for disassembly (see
Preparing to Disassemble the Computer
on page 26).
2. Remove the system board shield (see
System Board Shield on page 63).
3. In the order indicated by the numbers stamped into the heat sink, remove the three Phillips
screws that secure the heat sink to the system board.
Figure 6-49 Removing the heat sink
4. Lift the heat sink off the system board.
To replace the heat sink, reverse the removal procedures.
Heat Sink (Thermal Module) 65