Keysight N9912A Service Guide 4-7
Troubleshooting
Front Panel Group Troubleshooting
Front Panel Group Troubleshooting
If no sound:
— Enter a value of just “.” (decimal point) for a frequency.
A double beep should occur. Plug headphones into the unit if there is no
sound from the internal speaker. The internal speaker is disabled when
headphones are plugged in.
If the display is dark (no backlight):
— Press: Mode > System(7) > the left-most soft key > the next to the left-most
soft key > press the up arrow many times.
This should bring the display brightness setting to a viewable level.
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