No nothing happened. It did this 2 weeks ago and I unhooked everything and just let it sit because I didn't have time to mess with it...when I plugged everything back in it worked fine..then shut it off and got up and it was blank again. All lights are on computer, and the monitor goes on safe mode after 5 minutes. I don't have a extra video card. But I wanted to see if that was the problem before I ran out and bought one. Are they hard to put in?