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.
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Did you try this monitor with another PC and already verify that the VGA cable is OK. Common problem with Princeton monitors are due to bad DC filter capacitors in the power supply board, see example here:
The flashing green light and no display usually means that the backlight circuit has failed. You can verify this by shining a flashlight on the dark screen and see if there is an image. If there is an image, then the problem is the backlight circuit. Often the problem with the circuit is that the transistors burn out. There are sellers on ebay that sell repair parts kits to fix these monitors if you are handy or you can bring to to an electronic repair service to have it fixed.
I am not familiar with your particular model, but I do know what the problem is.
The inverter that runs the lights behind the screen is faulty and needs to be repaired. The lights shine from the top and bottom and reflect outwards through the panel so you can see what is on the screen. If you start the computer up, then shine a bright light into the panel you will see an image on the screen, but very feintly.
This can be cheap, it can also be expensive depending on where you go to get it repaired. Call aorund to a few TV shops in your area to get a rough idea on prices.
This is the way how to examine
what's wrong with your LCD monitors. After you turned your pc on, you have to check that if you can see the image on the screen or
not by shining a flashlight into the screen, not directly but find the best
angle to the screen and take a look very closely. If you can see the icons or
any image, there will be a minor problem. This is because of the lamps inside
screen. Some of them were broken and it is very easy to replace. If you cannot
see anything on the screen, there'll be some problems with inverter board. If you
have soldering tool and want to fix it by yourself, check the caps first. It
may cause this problem. Some caps might show leaking or burn spot on the board
because of too high temp. If you don't have soldering tool, you better go get a
technician to do so.
Hope this help!! If anything I can help you with, feel free to let me know. Thank you,
IF there is no display even with a flashlight, the P/S board is malfunctioning. Bad capacitors or LCD driver board circuit. Mine did this and it was bad caps, 4 of 8 were bad and a burned out chip on the P/S board.
Looks like one of your backlights is bad, first indication is the red or pink tint, replacement of the lamp is fairly easy. If one lamp is bad the inverter will not work. You can get a replacement lamp from Mouser electronics for about $12
Try another power adaptor.
Check the delivered voltage and go get a universal power adaptor that has a switched for varios voltages and a number of connectors.
Simply match connector to the voltage switch.