System Open Circuits And Short Circuits - HP ProLiant DL120 User Manual

Be sure you are not mixing processor stepping, core speeds, or cache sizes if this is not supported on
4.
the server. Refer to the server documentation for more information.
CAUTION:
replacement, while other processors and heatsinks are integrated and cannot be reused once
separated. For specific instructions for the server you are troubleshooting, refer to processor
information in the Hardware options installation (on page 23) section on the Documentation CD.
If the server has only one processor installed, replace it with a known functional processor. If the
5.
problem is resolved after you restart the server, the original processor failed.
If the server has multiple processors installed, test each processor:
6.
Remove all but one processor from the server. Replace each with a processor terminator board or
a.
blank, if applicable to the server.
If the server includes PPMs that are not integrated on the system board, remove all PPMs from the
b.
server except for the PPM associated with the remaining processor.
Replace the remaining processor with a known functional processor. If the problem is resolved after
c.
you restart the server, a fault exists with one or more of the original processors. Install each
processor and its associated PPM (if applicable) one by one, restarting each time, to find the faulty
processor or processors. Be sure the processor configurations at each step are compatible with the
server requirements.
PPM problems
Action: If the PPMs are not integrated on the system board:
CAUTION:
Operating the server in this manner results in improper airflow and improper cooling that can
lead to thermal damage.
If applicable, check the PPM LEDs to identify if a PPM failure occurred. For information on LEDs, refer to
1.
the server documentation.
Reseat each PPM, and then restart the server.
2.
If reseating the PPMs is not effective, remove all but one PPM, restart the server to see if the PPM is
3.
working, and then install each PPM individually, cycling power each time. Follow the warnings and
cautionary information in the server documentation.

System open circuits and short circuits

Action:
CAUTION:
Operating the server in this manner results in improper airflow and improper cooling that can
lead to thermal damage.
Check the server LEDs to see if any statuses indicate the source of the problem. For LED information,
1.
refer to the server documentation.
Remove all power sources to the server.
2.
Be sure no loose connections (on page 53) exist in the area.
3.
Be sure each component in the area is working. Refer to the section for each component in this guide.
4.
Removal of some processors and heatsinks require special considerations for
Do not operate the server for long periods with the access panel open or removed.
Do not operate the server for long periods with the access panel open or removed.
Troubleshooting 77