54 | Replacing the Processor Heat-SinkReplacing the Processor Heat-SinkWARNING: Before working inside your computer, read the safety informationthat shipped with your computer and follow the steps in "Before You Begin" onpage 11. After working inside your computer, follow the instructions in "AfterWorking Inside Your Computer" on page 13. For additional safety best practicesinformation, see the Regulatory Compliance Homepage atdell.com/regulatory_compliance.ProcedureNOTE: The original thermal grease can be reused if the original system board andheat sink are reinstalled together. If either the system board or the heat sink isreplaced with a new one, use the thermal pad provided in the kit to ensure thatthermal conductivity is achieved.1 Clean the thermal grease from the bottom of the processor heat-sink and reapplythe thermal grease.2 Align the captive screws on the processor heat-sink with the screw holes on thesystem board.3 In sequential order (indicated on the processor heat-sink), tighten the captivescrews that secure the processor heat-sink to the system board.4 Replace the screw that secures the cooling vents and the grounding cable tothe middle cover.Postrequisites1 Replace the system-board shield. See "Replacing the System-Board Shield" onpage 32.2 Replace the back cover. See "Replacing the Back Cover" on page 18.3 Follow the instructions in "After Working Inside Your Computer" on page 13.
