TILL ME WHAT TO DO

Buy a new one, with the prices today, is more expensive fix your LCD that buy another one.

saint19 you give this recommendation to each one that complains, or has problem with his LCD. It isn't quite right, because you will be amazed, that there are people that can report on a faulty monitor, when the problem is a loose connection.

^ok, i assume that many people checked the cables before write the thread.

Yeah, I guess check the cables, try two different computers, use different cables and power outlets if you can.
If that doesn't work, are you still in warranty for the monitor? If so, then try to get a replacement.
Do you want a new screen anyways? This is a great excuse to upgrade. =D

You guys are assuming that the problem lies with the monitor.

I agree with anamaniac, try the monitor on a different PC, or try a different monitor on your PC.

Do you hear the normal beeps when the PC powers on?

Yeah, good to check multiples sources. =D

I remember trying the VGA on the IO plate, but that didn't work on a computer a few years back... returned it to find out the integrated video was disabled and needed to use the discreet VGA port (my first comp with a discreet)...
Later my monitor went to hell. Just jiggling the power cord usually did it (with several different cords).