Black Screen after sleep mode, and even after restarting

I've had problems with black screen before, usually after sleep mode. I usually then restart the computer, the sound of turning the computer on is heard and then it is working perfectly...however since last night I tried to restart it, the sound of turning the computer on was heard at a lower level of volume, but the black screen is still there...I have disconnected the computer, taken the battery of the MBP reinsert it, plugged it and turned it on. It worked once, but it is no longer working...PLEASE HELP!!!!!! SOON!!!! I have projects to turn in in a couple of hours.
By the way I have the Snow Leopard OS system
Andy

See KB Article: http://support.apple.com/kb/TS2377 MacBook Pro: Distorted video or no video issues
If you are using SL, please correct your system info which shows you are still using "Leopard." Thank you.
!http://i45.tinypic.com/jl0z95.jpg!

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