Dell OptiPlex 9010 (Mid 2012) - Manual (Page 24)

3. Press the plastic clip to release and disconnect the heat-sink cable from the system board.
4. Use a Phillips screwdriver to loosen the captive screws in diagonal order and lift the heat sink away from the
computer.
Installing the Heat-Sink Assembly
1. Place the heat-sink assembly into the chassis.
2. Use a Phillips screwdriver to tighten the captive screws in diagonal order to secure the heat-sink assembly to the
system board.
3. Connect the heat-sink cable to the system board.
4. Install the cover.
5. Follow the procedures in After Working Inside Your Computer .
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