Princeton VL1715 monitor's pwr button is "locked." Can't turn-off

Try looking for bad caps first, see example of failed PRINCETON monitors because of bad caps here: http://s807.photobucket.com/home/budm/allalbums
Post back what you see so we can guide you further.
The ticking sound is from power supply turning on and off.

Check out LCD Parts for service, parts and DIY info. use this link to their WEB site : -
www.lcdparts.net

Try booting in Safe mode, see if you get video

If you do, reboot in VGA mode, then adjust the refresh rate accordingly

A replacement LCD is about $200 on EBay

I can give you the way to decipher the capacitor manufacturer codes, on the side of the capacitor.

This way you can find out what Voltage they are, and what Microfarad's.

1.Japanese and Taiwanese Electrolytic Capacitors,
http://www.hardwaresecrets.com/article/595
(Reading all 4 pages of the article is relevant to identifying)

Sounds like the monitor took a power surge. Monitor is probably bad but try hooking up the power to the monitor on a different power outlet and see if it turns on, if not then the monitor is bad and would need to be replaced.

No . I am not suggesting that you flash the BIOS . I am suggesting that newer drivers are likely available  and you should download them and install,especially the video card driver. They even have diagnostic software fot your model, if you have or can borrow another monitor that will work.     Their seems to be 12 different video cards on your model alone. If this doesn't work , judge me not harshly but give me a chance to have you try something else. 

From what you say there is probably not much you can do with it, the parts inside are SMD, to small
to work on. If you could still see txt on the screen when you shine your torch, it could be fixed by
replacing the back lighting PCB.

Hope this helps
Have a nice day.

Needed a DVI and VGA adaptor

Try this! Copied right from the Princeton Graphics support pages. (bless their hearts....'course it wasn't "real" easy to find; it was posted for a different monitor for a different problem... but it seems to work for different monitors... Mine's an LCD19D ... and no, it wasn't posted for my monitor either.)

Your EPROM needs to be reset. To accomplish this please
1) Power off the LCD
2) Unplug your VGA cable
3) Press the up arrow at the same time you power on the LCD monitor.
4) You will see a message "RESET EPROM" 5) Power off the unit
6) Plug in your VGA cable
7) Turn the power on.

--dadswank

Your EPROM needs to be reset. To accomplish this please
1) Power off the LCD
2) Unplug your VGA cable
3) Press the up arrow at the same time you power on the LCD monitor.
4) You will see a message "RESET EPROM" 5) Power off the unit
6) Plug in your VGA cable
7) Turn the power on.