Recover From A Program That Is Not Responding; Restart A Computer That Is Not Responding; Repairing A Wet Computer - Dell OptiPlex GX400 User Manual

9. Remove all expansion cards except the video card.
NOTE: If your primary hard drive is connected to a drive controller card and not one of the system board enhanced integrated drive electronics
(EIDE) connectors, leave the drive controller card installed in the computer.
10. Replace the computer cover, reconnect the computer and peripherals to their electrical outlets, and turn them on.
11. Run the RAM test group in the
Did any of the diagnostics tests fail?
Yes. Contact Dell for technical assistance.
No. Go to step 12.
12. Turn off the computer and peripherals, disconnect them from their electrical outlets, wait at least 5 seconds, and then remove the computer cover.
13. Reinstall one of the expansion cards that you removed previously, and repeat
Did any of the diagnostics tests fail?
Yes. The expansion card you just reinstalled is faulty and needs to be replaced.
No. Repeat step 12 and step 13
14. If you have replaced all the expansion cards and the problem is not resolved,

Recover From a Program That Is Not Responding

1. Press <Ctrl><Alt><Delete>.
Did the Close Program window appear?
Yes. Go to step 2.
No. Skip to step 4.
2. Click the program that no longer responds.
3. Click End Task.
Is the computer operating properly?
Yes. The problem is resolved.
No. Go to step 4.
4. Press the reset button to reboot the computer.

Restart a Computer That Is Not Responding

1. Press the reset button to reboot the system.
Did the computer reboot?
Yes. Skip to step 4.
No. Go to step 2.
2. Press and hold the power button until the computer turns off.
Did the computer reboot?
Yes. Skip to step 4.
No. Go to step 3.
3. Unplug the AC power cable from the computer, wait approximately 30 seconds, and plug in the AC power cable.
4. Press the power button to turn on the computer.
NOTICE: If your computer is not responding, turning off power or unplugging the power cord should be done only as a last resort. Doing so can cause
problems with system settings and configuration.

Repairing a Wet Computer

Spills, splashes, and excessive humidity can cause damage to the system. If an external device, such as a printer or modem, gets wet, contact the
manufacturer of the device for instructions.
CAUTION: Before you perform this procedure, see
Fill out the Diagnostics Checklist as you perform the following steps:
Dell Diagnostics.
with another expansion card. Go to step 13.
"Safety First— For You and Your
step 10 and step 11.
contact Dell for technical assistance.
Computer."