Agilent Technologies HP 8719D Service Manual page 153

Observe the pbwer Up Sequence
Switch the analyzer power OS, then on. The following should take place within
a few seconds:
On the front panel observe the following:
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1. All six amber LEDs illuminate.
2. The port 2 LED ihminate~
3. The amber LEDs go off after a few seconds, except the CH 1 LED. At the
same moment, the port 2 LED goes off and the port 1 LED illuminates
(See Figure 46.)
After an initial pattern, five red LEDs on the A9 CPU board should remain
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off. They can be observed through a small opening in the rear panel.
If the power up sequence does not occur as described, or if there are
problems using the front panel keyboard, refer to Chapter 6, "Digital Control
Troubleshooting. n