64 Installing System ComponentsInstalling the Cooling ShroudCAUTION: Many repairs may only be done by a certified service technician.You should only perform troubleshooting and simple repairs as authorized inyour product documentation, or as directed by the online or telephone serviceand support team. Damage due to servicing that is not authorized by Dell is notcovered by your warranty. Read and follow the safety instructions that camewith the product.1 Align and press the cooling shroud down on the system board.See Figure 3-7.2 Replace the system-board assembly. See "Installing a System-BoardAssembly" on page 62.3 Reconnect the system to its electrical outlet and turn on the system,including any attached peripherals.Heat SinksRemoving the Heat SinkCAUTION: Many repairs may only be done by a certified service technician.You should only perform troubleshooting and simple repairs as authorized inyour product documentation, or as directed by the online or telephone serviceand support team. Damage due to servicing that is not authorized by Dell is notcovered by your warranty. Read and follow the safety instructions that camewith the product.1 Turn off the system, including any attached peripherals, and disconnectthe system from its electrical outlet.2 Remove the system-board assembly. See "Removing a System-BoardAssembly" on page 61.3 Remove the cooling shroud. See "Removing the Cooling Shroud" onpage 63.WARNING: The heat sink may be hot to touch for some time after the systemhas been powered down. Allow the heat sink to cool before removing it.CAUTION: Never remove the heat sink from a processor unless you intendto remove the processor. The heat sink is necessary to maintain properthermal conditions.
