Dell Dimension 4700 - Manual (Page 33)

Removing the System Board
1. Follow the procedures in " Before You Begin ."
2. Remove the floppy drive. To remove the floppy drive, see " Installing a Floppy Drive ."
3. Remove any cards that are installed.
4. Disconnect all cables from the system board.
5. Lift up the heat-sink shroud.
6. Remove the microprocessor heat sink .
7. Remove the fan assembly .
8. Remove the 12 screws that secure the system board to the computer frame.
Four of the 12 screws that secure the system board to the computer frame also secure the heat-sink base to the system board.
9. Lift the system board out from the computer.
10. 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.
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before removing the cover.
CAUTION: The microprocessor heat sink can get hot. To avoid burns, ensure that the heat sink has had sufficient time to cool before you touch it.
CAUTION: The microprocessor package can get hot. To avoid burns, ensure that the package has had sufficient time to cool before you touch it.