System Board 115Replacing the System BoardProcedure1 Align the screw holes on the system board with the screw holeson the chassis.2 Replace the screws that secure the system board to the chassis.3 Connect all the cables to the system-board connectors.Postrequisites1 Replace the wireless mini-card.See "Replacing the Wireless Mini-Card" on page 59.2 Replace the TV tuner card. See "Replacing the TV Tuner Card" on page 56.3 Replace the processor. See "Replacing the Processor" on page 75.4 Replace the processor heat-sink fan.See "Replacing the Processor Heat-Sink Fan" on page 71.5 Replace the processor heat-sink.See "Replacing the Processor Heat-Sink" on page 67.6 Replace the I/O board shield.See "Replacing the I/O Board Shield" on page 88.7 Replace the I/O cover. See "Replacing the I/O Cover" on page 83.8 Replace the B-CAS card. See "Replacing the B-CAS card" on page 27.9 Replace the power-supply fan bracket.See "Replacing the Power-Supply Fan Bracket" on page 79.10 Replace the memory modules.See "Replacing the Memory Module(s)" on page 37.11 Replace the system-board shield.See "Replacing the System-Board Shield" on page 51.12 Replace the VESA-mount bracket.See "Replacing the VESA-Mount Bracket" on page 44.13 Replace the back cover. See "Replacing the Back Cover" on page 24.14 Replace the stand. See "Replacing the Stand" on page 21.15 Follow the instructions in "After Working Inside Your Computer" on page 13.