Dell Dimension 2350 - Manual (Page 29)

12. Lift the system board out from the computer.
13. Place the system board that you just removed next to the replacement system board.
Visually compare the replacement system board to the existing system board to ensure that you have the correct part.
Installing the System Board
1. Transfer components from the existing system board to the replacement system board:
a. Remove the memory modules and install them on the replacement board.
b. Remove the microprocessor package from the existing system board and transfer it to the replacement system board.
2. Configure the settings of the replacement system board.
Set the jumpers on the replacement system board so that they are identical to the ones on the existing board.
3. Place the system board inside the computer frame, place the heat-sink base on the system board, and then replace the screws that you removed in
step 11 of the preceding procedure.
4. Reinstall the microprocessor heat sink, and then lower the heat sink shroud.
5. Reattach the cables to the system board.
6. Reinstall any cards.
7. Replace the floppy drive .
8. Replace the computer cover .
9. Connect your computer and devices to electrical outlets, and turn them on.
Replacing the Power Supply
Removing the Power Supply
1. Shut down the computer through the Start menu.
2. Ensure that your computer and attached devices are turned off. If your computer and attached devices did not automatically turn off when you shut
down your computer, turn them off now.
3. Disconnect any telephone or telecommunication lines from the computer.
4. Disconnect your computer and all attached devices from their electrical outlets, and then press the power button to ground the system board.
CAUTION: The microprocessor package can get hot. To avoid burns, ensure that the package has had sufficient time to cool before you touch it.
NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions provided in your Owner's Manual.
NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network wall jack.