24 | Removing the Heat SinkRemoving the Heat SinkWARNING: Before working inside your computer, read the safety informationthat shipped with your computer and follow the steps in "Before Working InsideYour Computer" on page 7. After working inside your computer, follow theinstructions in "After Working Inside Your Computer" on page 9.For more safety best practices, see the Regulatory Compliance home page atdell.com/regulatory_compliance.Prerequisites1 Remove the base cover. See "Removing the Base Cover" on page 10.2 Disconnect the power-light board cable from the system board. See "Removing thePower-Light Board" on page 12.3 Remove the battery. See "Removing the Battery" on page 14.Procedure1 In sequential order (indicated on the heat sink), loosen the captive screws thatsecure the heat sink to the system board.2 Lift the heat sink off the system board.1 heat sink 2 captive screws (4)12