System Board Problems; Resetting A Damaged System Board - Dell OptiPlex GX400 User Manual

4. Remove the computer cover.
5. Remove and install the microprocessor.
6. Ensure that the microprocessor fan cable is firmly connected to the connector on the system board.
7. Replace the computer cover.
8. Stand the computer upright.
9. Reconnect the computer and peripherals to their electrical outlets, and turn them on.
Is the computer working properly?
Yes. The problem is resolved.
No. Contact Dell for technical assistance.

System Board Problems

A system board problem can result from a defective system board component, a faulty power supply, or a defective component connected to the system
board. If an error message indicates a system board problem, fill out the
CAUTION: Before you perform this procedure, see
1. Reboot the system and run the System Board Devices test group in the
Did any of the tests fail?
Yes. Contact Dell for technical assistance.
No. Go to step 2.
2. Turn off the computer and peripherals, disconnect them from their electrical outlets, wait at least 5 seconds, and then
3. Make sure the power cables from the power supply are firmly connected to the connectors on the system board.
4. Replace the computer cover, reconnect the computer and peripherals to their electrical outlets, and turn them on.
Is the computer working properly?
Yes. The problem is resolved.
No. Go to step 5.
5. Perform the procedure in "Expansion-Card
Is the computer working properly?
Yes. The problem is resolved.
No. Go to step 6.
6. Perform the procedure in "Keyboard
Is the computer working properly?
Yes. The problem is resolved.
No. Go to step 7.
7. Perform the procedure in "Resetting a Damaged System
Is the computer working properly?
Yes. The problem is resolved.
No. Contact Dell for technical assistance.

Resetting a Damaged System Board

If the system cannot boot and you have exhausted all other troubleshooting options, perform the following steps.
CAUTION: Before you perform this procedure, see
1. Turn off the computer and peripherals, disconnect them from their electrical outlets, wait at least 5 seconds, and then
2. Install a jumper plug on the RTCRST jumper pins and then remove it.
See "Jumper Settings" to locate the real-time clock reset jumper (labeled "RTCRST") on the system board.
3. Replace the computer cover, reconnect the computer and peripherals to their electrical outlets, and turn them on.
Is the computer working properly?
Diagnostics Checklist
"Safety First— For You and Your
Problems."
Problems."
Board."
"Safety First— For You and Your
as you perform the following steps.
Computer."
Dell Diagnostics.
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remove the computer cover.
remove the computer cover.