Replacing the Heat SinkWARNING: Before working inside your computer, read the safetyinformation that shipped with your computer and follow the steps inBefore Working Inside Your Computer. After working inside yourcomputer, follow the instructions in After Working Inside YourComputer. For more safety best practices, see the RegulatoryCompliance home page at dell.com/regulatory_compliance.CAUTION: Incorrect alignment of the heat sink can cause damage tothe system board and processor.NOTE: The original thermal grease can be reused if the original systemboard and fan are reinstalled together. If either the system board or thefan is replaced, use the thermal pad provided in the kit to make sure thatthermal conductivity is achieved.Procedure1 Clean the thermal grease from the bottom of the heat sink and reapplythe thermal grease.2 Align the captive screws on the heat sink with the screw holes on thesystem board.3 In sequential order (indicated on the heat sink), tighten the captive screwsthat secure the heat sink to the system board.4 Replace the screw that secures the heat sink to the display-panel base.Post-requisites1 Replace the system-board shield.2 Replace the back cover.3 Follow the procedure from step 3 to step 5 in “Replacing the StandAssembly”.61
