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Chapter 6 Troubleshooting
A blinking green power LED indicates the HP Server tc3100 is in a sleep mode.
These are basic guidelines for troubleshooting video issues. They are arranged in such an order as to be used
progressively. The HP Server should not be re-populated with components until video is produced. For each
step taken, be certain to unplug the power for 30-60 seconds prior to powering the HP Server back on. For
each power up attempt, allow at least 60 seconds for the HP Server to produce video.
NOTE Take appropriate electrostatic discharge precautions prior to working inside the HP
Server.
NOTE If using a third-party video controller card and the onboard video controller (if applicable)
was disabled, remove this controller card, connect the cable to the onboard video
controller then clear the CMOS. This re-enables the onboard video. For instructions on
clearing CMOS, refer to the section on this earlier in this chapter.
1. Test the monitor on another machine to verify the monitor is not faulty.
2. Disconnect the HP Server from any console switch box during troubleshooting. Connect a known good
monitor, keyboard, and mouse to the HP Server to troubleshoot.
3. Verify that the AC power source is good. If suspect, try another power source.
NOTE Verify that fans and hard drives are spinning up. If no fans or drives are spinning up, see
previous section on Power Problems.
If there is still no video:
4. Power off the HP Server and unplug from the power source and remove the covers.
5. Locate and toggle the “CLEAR CONFIG” switch to the “ON” position.
6. At the same time, check the processor speed switches to verify that they are set correctly.
7. Plug the HP Server into a power source and power on the HP Server. Quite often, just toggling the
“CLEAR CONFIG” switch will restore video.
If there is still no video:
8. Power off the HP Server and unplug form the power source.
9. Remove all PCI controller cards.
10. Disconnect power and SCSI connections from tape drives and hard drives.
11. Disconnect IDE and flexible disk drive cables.
12. Take the HP Server down to base memory (1 DIMM) and reseat that DIMM.
13. Plug the HP Server into a known good power source and power on the HP Server.
14. If video returns, reinstall the removed components one at a time back into the HP Server. One of the
removed components may have been causing the no video problem.
15. After all the components are reinstalled, reset the HP Server’s BIOS configuration switch back to the
appropriate setting.
If the problem persists, contact the HP Customer Support Center for further troubleshooting assistance before
replacing any parts.
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