Removing The System Board - Dell Dimension 5100 Service Manual

Jumper Setting Description
PSWD Password features are enabled.
(default)
Password features are disabled.
RTCRST Real-time clock reset in normal operation.
(default)
Clear CMOS settings.

Removing the System Board

CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.
NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the
computer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components.
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.
NOTICE: To disconnect a network cable, first unplug the cable from your computer and then unplug it from the network port or device.
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.
5. Remove the computer cover.
6. Remove any components that restrict access to the system board
7. Remove the heat-sink assembly
8. Disconnect all cables from the system board.
NOTE: The mounting-bracket screws also hold the system board and need to be removed for the removal of the system board.
9. Remove the eight system-board screws and the two mounting-bracket screws.
10. Slide the system board assembly toward the front of the computer, and then lift the board away.
(CD/DVD
and processor.
drive(s), floppy drive, hard drive, front I/O panel).