Monitor won't stay on.

It could be two things. 1). The video card is set to a resolution the monitor does not support. 2). The monitor's power supply is bad. You can try to boot into rescue (or "safe") mode, and adjust the video card to a resolution the monitor supports. OR, power supplies usually go bad because capacitors bulge or otherwise go bad. Most monitor power supplies are hard to get, so people typically repair them. If you disassemble the monitor shell, you can see the power supply (where the AC cord goes). You can look at the metallic, cylindrical looking things with minus signs down one side, and if they look bulged on top, you can replace them. You can get replacements at mouser.com.

Your monitor's power supply is probably bad. If your inclined, you can pry apart the monitor shell and replace any bulged capacitors you see on the power supply. Replacement capacitors are available from mouser.com.

The power supply caps need replace on power supply, or replace power supply.

I have the same monitor, its a power supply problem from the computer most likely. check the cable connections etc... I would get a service call from an authorized dealer near you ... about $120.00. Hope this helps:)

Capcitors in the power supply will be the first thing to check, see examples of what goes out in monitors: http://s807.photobucket.com/home/budm/allalbums
Post back what you see so we can guide you further.

Sounds like you need a new backlight. Check lcdparts.net

You have a burned out Backlight Fluorescent Bulb.

Power supply could be failing

Try connecting the wires properly. try changing the VGA cable. i had the same problem my screen goes black some times and pink i changed the VGA cable it was absolutely fine!!!
What is VGA cable
VGA Cables Adapters Converters and Devices C2G

visit a computer mechanic for further trobleshooting