Samsung 940bx only stays on for 1-2 seconds

I have a samsung 940BX and i normally use it to game and do some homework on. I've had it since september 2007 and i never had any problems with it. I never leave it on over night or when i'm not here. The thing is not abused at all.

I turned on the computer this morning and the monitor showed a black screen. I turned it off and turned it back on and it showed me my windows screen perfectly normal and then went black again. It's not going into standby, it wont let me access the monitors built in options while its in this black screen mode. I tried to connect the computer through analog and it lasted about 4-5 seconds before it went black and then it started to last only 1 sceond before it would turn black after i turned it on.


EDIT: I've managed to see something unusual. The monitor isn't going completely black, i can see the screen but its soooooo dark i can't make it out. i reset all the brightnesses and settings but nothing =/.
The system is a

nothings overclocked right now

evga 680i
8800gts g92 512mb
2gb kingston @ 800mhz
seagate 500gb sata
e6750 2.66ghz
rosewill 550w psu
samsung dvd-rw/cd-rw

thats pretty much all that is inside this computer except a few fans. Nothing extreme or anything. thanks ahead for your help and time.