Dell Dimension 4400 - Manual (Page 23)

5. Remove or move any components that restrict access to the system board.
6. Disconnect all cables from the system board.
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.
7. Pull up on the tab and slide the system board toward the front of the computer; lift it up and away.
8. Place the system board that you just removed next to the replacement system board.
Replacing 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 fan/heat sink assembly and microprocessor package from the existing system board and transfer them to the replacement system
board.
2. Configure the settings of the replacement system board. Set the jumper on the replacement system board so it is identical to the one on the existing
board.
3. Orient the replacement board by aligning the notches on the bottom to the tabs on the computer frame floor.
4. Slide the board toward the back of the computer until it clicks into place.
5. Replace any components and cables that you removed from the system board.
6. Reconnect all cables to their connectors at the back of the computer, clos e the computer cover, and reconnect the computer and devices to their power
sources and turn them on.
Closing the Computer Cover
1. Ensure that all cables are connected, and fold cables out of the way.
2. Ensure that no tools or extra parts are left inside the computer.
3. Pivot the cover down and ensure that the release buttons click into place.
4. Connect your computer and devices to their electrical outlets, and turn them on.
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NOTICE: The system board and the metal tray are attached and are removed as one piece.
CAUTION: The microprocessor package and heat sink assembly can get hot. To avoid burns, be sure that the package and assembly have had
sufficient time to cool before you touch them.
NOTICE: Some components and connectors on the replacement system board may be in different locations than the corresponding connectors on the
existing system board.
NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.