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 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 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 appropriatechanges again after you replace the system board.Procedure1 Slide the system board under the tabs on the palm-rest assembly and align thescrew holes on the system board with the screw holes on the palm-restassembly.2 Replace the seven screws (M1.6x2.5) that secure the system board to the palm-rest assembly.3 Replace the screw (M1.6x3) that secures the system board to the palm-restassembly.4 Slide the power-button cable, fingerprint-reader cable, battery-status light cable,the touch-pad cable, the keyboard-backlight cable, and the keyboard-controlsboard cable into the system board and close the latches to secure the cables.5 Connect the camera cable, the touch-screen cable, the coin-cell battery cable,the speaker cable, and the display cable to the system board.6 Adhere the tape that secure the speaker cable to the system board.7 Align the screw holes on the display-cable bracket with the screw holes on thesystem board.8 Replace the two screws (M1.6x2.5) that secure the display-cable bracket to thesystem board.42