Replacing the system boardWARNING: Before working inside your computer, read the safetyinformation that shipped with your computer and follow the steps inBefore working inside your computer. After working inside yourcomputer, follow the instructions in After working inside yourcomputer. For more safety best practices, see the RegulatoryCompliance home page at www.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 replacethe system board.NOTE: Replacing the system board removes any changes you havemade to the BIOS using the BIOS setup program. You must make thedesired changes again after you replace the system board.Procedure1 Slide the ports on the system board into the slots on the back of thechassis and gently place the system board into the chassis.2 Align the screw holes on the system board with the screw holes on thechassis.3 Replace the screws that secure the system board to the chassis.4 Close the front panel and align the screw hole on the front panel to thescrew hole on the chassis.5 Replace the screw that secures the front panel to the chassis.6 Connect the power-button cable, hard-drive data cable, optical-drivedata cable, and hard-drive and optical-drive power cable to the systemboard.Post-requisites1 Replace the graphics card.2 Replace the wireless card.3 Replace the memory module.4 Replace the drive cage.5 Replace the heat-sink assembly.6 Replace the front bezel.81