I was watching an avi movie on vlc in full screen on an external monitor yesterday but when i tried to exit out of full screen it seemed that my keypad was locked. I held down the power button on my macbook pro to shut it down, but when it restarted the macbook pro display stayed black like it was while watching the movie on the external monitor. I can't get the display to light up and I've unplugged the external monitor from my macbook pro. Could my video card be screwed up? Anybody with any help would be great.