Replacing the system boardWARNING: Before working inside your computer, read the safetyinformation that shipped with your computer and follow the steps in Beforeworking inside your computer. After working inside your computer, followthe instructions in After working inside your computer. For more safety bestpractices, see the Regulatory Compliance home page at dell.com/regulatory_compliance.NOTE: Your computer’s Service Tag is stored in the system board. Youmust enter the Service Tag in the BIOS setup program after you replace thesystem board.NOTE: Replacing the system board removes any changes you have made tothe BIOS using the BIOS setup program. You must make the desiredchanges again after you replace the system board.Procedure1 Align the screw holes on the system board with the screw holes on thecomputer base.2 Replace the screw that secures the system board to the computer base.3 Connect the power-adapter port cable and the speaker cable to the systemboard.4 Slide the touch-pad cable and keyboard-backlight cable into the connectors onthe system board and press down the latches to secure the cable.5 Slide the keyboard cable into the connector on the system board and pressdown the latch to secure the cable.6 Connect the hard-drive cable to the system board.7 Slide the Windows-button board cable into the connector on the system boardand press down the latch to secure the cable.8 Adhere the tape to the Windows-button board connector.9 Connect the display cable to the system board.10 Align the screw holes on the display-cable bracket with the screw holes on thesystem board.11 Replace the screws that secure the display-cable bracket to the system board.66