URGENT HELP!!! monitor turns off!

FIXED!!! URGENT HELP!!! monitor turns off!

Please help me.
I finnaly came home from work, and I went to turn on my computer, everything came up nicely, I got to the windows xp loading screen, and right before it goes to the welcome screen, bam, monitor shuts off, it says there is no input, and it goes into standby. What do I do??!??!?!!? I tried both ports, I even tried a bit of dust removal!

I'm using the monitor right now on my dads computer....
monitor= HP L1902
Video= N6800GT <-ASUS

Uhh, nevermind, I figured it out. Apparentely when I installed Counter Strike Source, I ignored the "YOU MUST install newest drivers before playing" pop-up, and, ya.. So, It ended up me forgetting about the forceware drivers hehe... sorry guys