Monitor is erratic in operation - Power supply issue. Sooner or later the anomaly will become permanent and it will not power on. Just be ready for the eventuality.
SOURCE: stuck in power save mode
Have you have selected the input you are using? You can switch between analog and digital input. The monitor would stay in power save if the input other than the one you are using is selected.
I believe the default input is DVI. Are you using VGA?
In the menu, under advanced, you can select the input.
SOURCE: i have the princeton VL193 monitor. Its blank, no power light
Most common failures in the LCD monitors are bad capacitors (bulging top/seal or leaking) in the power supply, failed inverter circuits (blown fuse, shorted transistors, shorted/open transformers), bad lamps (poor solder connections or worn out lamps). You will need to open it up and inspect the inside, see example of failed Princeton monitors to get some ideas what to look for: http://s807.photobucket.com/home/budm/allalbums
Post back what you see inside so we can guide you further and it will help out other people in the future also.
http://en.wikipedia.org/wiki/Capacitor_plague
http://www.badcaps.net
Testimonial: "thank you the explanation sounds like its right on the mark. Unfortunately, I see these being sold used for under $50 so it is not worthwhile for me to repair as I don't have the expertise and I would think I would be charged at least that by a shop.I was hoping there was a reset button as I think the monitor succumb to an outage. Thanks again. "
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