Agilent Technologies E8285A Manual page 50

Troubleshooting
Self-Test Diagnostics
4. If the Test Set does not power-up properly, but the fan operates and the power
5. If there is no display, but VIDEO OUT port on the rear panel has the signal
Figure 2-4 VIDEO OUT Signal
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S:\agilent\e8285\ALR\Book\chapters\trouble.fm
supply voltages are correct on the Power Supply Regulator outputs, the
Controller may be failing. Check TP2 on the Controller for +5V. If +5V is
present, the Controller assembly is faulty.
shown in figure 2-4, then the Display assembly is faulty. If the signal is not
present, then Display Drive assembly is faulty.
500µs/div.
500mV/div.