Pavilion dv7 and the creen went black..

Hello,

I have a pavilion dv7 1240-us,I was using it like any other day, when the screen just went black ,I can load in safe mode all day but when I load normally it will go black after a few seconds of coming on, After some research I figured out that if i deactivate my video driver it will be ok but as soon as i activate the video driver the screen turns black and my computer will freeze.
here is a list of things I have already tried.

reinstall OS.
flash BIOS
reinstall video driver
Ran AVG 9.0 no virus found..

if any body can help I would appreciate u for ever since i don't have the money for another laptop.. and i really need it.. Help