Installing System Components | 125processor.CAUTION: Using excess thermal grease can cause grease to contact theprocessor shield, which can cause contamination of the processor socket.8 Place the heat sink on the processor. See Figure 3-8.9 Using a Phillips screwdriver, tighten the heat-sink retention screws. SeeFigure 3-8.10 Install the air duct(s). See "Installing the Air Duct" on page 117.11 Install the system-board assembly. See "Installing a System-BoardAssembly" on page 116.12 Reconnect the system to its electrical outlet and turn on the system,including any attached peripherals.13 Press to enter the System Setup program, and check that theprocessor information matches the new system configuration. See"System Setup Options at Boot" on page 46.Expansion-Card Assembly and Expansion CardRemoving the Expansion CardCAUTION: Many repairs may only be done by a certified service technician. Youshould only perform troubleshooting and simple repairs as authorized in yourproduct documentation, or as directed by the online or telephone service andsupport team. Damage due to servicing that is not authorized by Dell is notcovered by your warranty. Read and follow the safety instructions that came withthe product.1 Recommend to turn off the system, including any attached peripherals,and disconnect the system from its electrical outlet.2 Remove the system-board assembly. See "Removing a System-BoardAssembly" on page 115.3 Remove the three screws that secure the expansion-card assembly. See
