Information Technology

I was playing world of war craft one day on my computer and all of a sudden the screen blinked rapidly and shut off. I proceeded to turn off my computer and restart it when it came back on it said that the error was due to Nvadia Graphics Driver. I thought maybe it was a glitch and ignored it. After I played WOW a second time it did the same thing and shut off and restarted so I waited and it went to a black screen and then a gray screen and would not do anything but restart from there. I left it alone for 24 hours and turned it on the next morning; it worked and after testing a different part of WOW just shut off for good. Whenever the computer is turned on all it does now is stay on a gray screen. My husband had said it was probably the graphics card so I was wondering if that’s what it could be? This is what kind of computer I have: HP Pavilion dv9800 CTO Entertainment Notebook PC Please help if you can I use the computer for everything and we really don’t want to pay to have the warranty extended just for this problem (its 50$ just for two weeks.)