Dell 5100C Replacing the System Board

5. Disconnect the modem cable and ground wire from the modem:
a. Disconnect the modem cable from the modem.
b. Use a size #1 screwdriver to remove the screws that secure the modem and ground wire to the system board, and set the screws aside.
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6. Before you remove the existing system board, visually compare the replacement system board to the existing system board to make sure that you have
the correct part.
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7. Remove the six screws that attach the system board to the bottom of the computer.
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8. Lift the system board out of the computer.
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9. Place the system board that you just removed next to the replacement system board.
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Replacing the System Board
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1. Transfer components from the existing system board to the replacement system board:
a. Remove the memory modules and install them on the replacement system board.
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b. Remove the heat-sink assembly and processor package from the existing system board and transfer them to the replacement system board.
c. Remove the modem from the existing system board and transfer it to the replacement system board.
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2. Configure the settings of the replacement system board.
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3. Set the jumpers on the replacement system board so that they are identical to the ones on the existing system board.
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4. Orient the replacement system board by aligning the slots in the bottom of the board to the tabs on the computer.
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5. Slide the system board down onto the pins.
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6. Replace the screw that holds the system board down.
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7. Reconnect the modem cable and ground wire to the modem:
a. Reconnect the modem cable from the modem.
b. Use a size #1 screwdriver to remove the screws securing the modem and ground wire to the system board, and set the screws aside.
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8. Replace any components and cables that you removed from the system board.
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9. Reconnect all cables to their connectors at the back of the computer.
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10. Close the computer cover.
CAUTION: The heat-sink assembly and processor package can get hot. To avoid burns, ensure that the assembly and package have had sufficient
time to cool before you touch them.
NOTE: Some components and connectors on the replacement system board may be in different locations from corresponding connectors on the existing
system board.