Hp pavilion dv6700 screen not showing..

Finally i found someone else with my problem, i got a HP pavilion dv6700 with nvidia graphics and windows vista. It worked fine until today when it just wouldnt show me crap on the screen, ive tried searching for it on this forum but all i found was press ctrl+alt+delete and do lotsa stuff... BUT HOW THE H£LL can i do that when i cant see anything and the computer wont even respond to anything else than the power button? The fan is going and all the stuff on my keyboard is lighting up like it should, but the screen is jsut like it was before i turned on the computer. I guess its my graphics card thats against me on this one. Theres obviously no warranty on it and i dont want to buy a new graphic card when i dont even know if thats the problem.
So if anyone could help me i would be forever happy.