Dell P86F Service Manual page 65

Installing the heatsink—discrete
Steps
1. Place the heatsink on the system board and align the screw holes on the heatsink with the screw holes on the system board [1].
2. In sequential order (as indicated on the heatsink), tighten the seven captive screws that secure the heatsink to the system board [2].
Removing and installing components 65