Removal and Replacement Procedures88
4.29 CPU Heatsink
CAUTION: Different versions of the CPU heatsink exist, but the overall procedures listed are sufficient to assist you in
removing the heatsink.
To remove the CPU heatsink:
1. Turn on the workstation and enter Computer Setup (F10) (section 3.1). Let the workstation run in this mode for five
minutes.
This action warms the thermal interface material between the CPU heatsink and processor so that the thermal
bond loosens and can more easily be broken.
CAUTION: Removing the CPU heatsink while the thermal compound is cold puts unnecessary mechanical stress on the
CPU and the CPU socket. This action could damage the processor and the processor socket.
NOTE: Windows in idle state does not provide sufficient heat to warm the compound.
2. After warming the thermal interface, shut down the system, disconnect power from the system (section 4.2) and
open the access panel (section 4.9).
3. Loosen the captured heatsink screws from the system board in pairs. Begin by slightly loosening any two screws
that are diagonally opposite from one another, then slightly loosen the other two. Then finish removing the
screws.
4. Gently twist the heatsink unit to break the thermal grease binding.
5. Disconnect the CPU heatsink cable 1 from the system board.
6. Lift the CPU heatsink 2 unit.
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