9. Lift the system board up and out.10. Compare the system board that you just removed with the replacement system board to ensure that they are identical.Replacing the System Board1. Follow the procedures in Before You Begin.2. Gently align the system board into the chassis and slide it towards the back of the computer.3. Replace the eight screws that secure the system board to the chassis.4. Connect the cables that you disconnected from the system board (see System Board Components).5. Replace the processor (see Replacing the Processor).6. Replace the processor fan and the heat sink assembly (see Replacing the Processor Fan and Heat Sink Assembly).7. Replace the memory modules (see Replacing the Memory Module(s)).8. Replace any PCI and PCI Express cards on the system board, if applicable (see Replacing PCI and PCI Express Cards).9. Replace the computer cover (see Replacing the Computer Cover).10. Connect your computer and devices to electrical outlets, and turn them on.11. Flash the system BIOS, as needed.Entering the Service Tag in the BIOS.1. Turn on the computer.2. Press during POST to enter the system setup program.3. Navigate to the security tab and enter the service tag in the Set Service Tag field.Back to Contents PageNOTE: Some components and connectors on the replacement system board may be in different locations compared to the components andconnectors on the existing system board.NOTE: Jumper settings on the replacement system board is preset at the factory.CAUTION: Only a certified service technician should perform repairs on your computer. Damage due to servicing that is not authorized by Dell™is not covered by your warranty.CAUTION: Ensure that the heat sink assembly is correctly seated and secure.NOTE: For information on flashing the system BIOS, see Flashing the BIOS.