Power Problems; Video/Monitor Problems - HP Tc2120 - Server - 256 MB RAM Maintenance Manual

Chapter 6

Power Problems

Symptom:
•
A fan is not working.
Action:
1. Review the Troubleshooting Checklist before you continue.
2. Verify all cable connections:
o AC power cord from AC source outlet to server.
o DC power supply cable to system board.
o DC power supply cables to all mass storage devices, including the flexible disk drive.
o DC power supply cable to all fans (system, power supply, and processor heat sink).
3. If the fans (system, power supply, and processor heat sink) are not working, call your HP Customer Support
provider.
Typically, all fans run when power is turned on and all fans are off when the power is turned off.

Video/Monitor Problems

Symptoms:
•
The monitor's power indicator LED is on, but the monitor is blank.
•
The wrong size characters appear on the monitor.
•
Colors are wrong or there are no colors on the monitor.
Action:
1. Verify the video and power cords are connected to the monitor.
2. Ensure there is adequate power:
a. Verify the display power switch is turned on.
b. Verify the display power cord is connected to an AC power outlet and the video cable connected to the
server's video connector.
c. Plug in a known working device to ensure there is power to the outlet or use the proper testing device to
check the power outlet.
d. Turn the monitor off and on, and if the monitor has an On/Off LED, see if it lights.
e. Check if the problem persists.
3. If the problem persists, and if the power cord is detachable, try a known good power cord.
a. Unplug the power cord and wait 30 seconds.
b. Plug in the power cord and turn on the server.
c. Wait a full 2 minutes.
d. Verify the monitor starts displaying normally.
4. Check the contrast and brightness controls to ensure each is adjusted.
5. If the problem persists, remove the monitor connector and check for bent pins on the connector.
Troubleshooting
68