Service manual

Chapter 5 Troubleshooting

Processor Problems

Certain HP NetServer modules contain diagnostic LEDs that indicate memory errors, processor module

errors, or processor voltage regulator module (VRM) errors.

1. Remove and reseat the processor module(s).

2. Remove and reseat the VRM(s).

3. Verify that the processor speed switches are set correctly.

4. Replace each of these components, one-at-a-time, with a known-good one, and retest the

system:

•VRM

• Processor

• Processor board (if so equipped)

CAUTION Do not push on any components on the VRM; push on the edge of the main board

only. Pushing on this device may break it.

If the fault persists, replace the system board.

Printer/DataComm Problems

Symptom:

A printer does not print or DataComm devices are not working.

If the printer does not work, or the DataComm devices are not working, do the following:

1. Review the Troubleshooting Checklist before you continue.

2. Verify the correct cables have been used, the cables are connected properly, and the cable pins

are not bent.

Check the cable for continuity, or try a known good cable. Refer to the peripheral's manual.

3. Verify that the AC power cord is plugged into the power source and the printer.

4. Make sure that the printer power switch is on.

5. Make sure that the AC outlet is working. If the printer is plugged into a multiple-outlet box,

make sure the switch on the outlet box is turned on, and the circuit breaker (if equipped) is not

tripped.

6. Make sure that the printer is on-line.

7. Examine the printer for a paper jam.

8. Run the printer internal self-test (if it has one) to make sure that the printer is functional. Refer to

the printer’s manual for instructions.

9. Make sure that you have selected the correct port setting when you configured the printer. The

printer must be configured correctly for the server and for the application. You may need to

change some switch settings on the printer.

10. Make sure that you have not disabled the I/O ports. Run the Setup Utility (press F2during the

boot process) and verify the I/O port status.