Figure 5-6. The Active Led Location; If The Self-Test Fails To Run Properly - HP 8517B Operating & Service Manual

Troubleshooting the Test Set
Troubleshooting Procedures
Figure 5-6 The ACTIVE LED Location

If the Self-Test Fails to Run Properly

If the portion of memory holding the self-test program is faulty, the self-test
will not run properly. If any of the following conditions occur, it indicates
that the A4 HP-IB board is likely to be faulty.
•
All LEDs flash briefly, then turn off
•
All LEDs flash briefly and stay on
•
The ACTIVE LED turns on too quickly after power on
•
The ACTIVE LED does not turn on at all
5-10 HP 8517B S-Parameter Test Set Manual