I've recently had this happen to me. I have a Dell XPS M170. The video card I have is a GeForce Go 6800 Ultra. I was playing Lord of the Rings Online and all of a sudden my screen went all fuzzy. I had to turn off my computer. When I turned it back on, there were these lines of symbols that were all over the screen and words on the screen had some vertical lines going through them. Before windows gets the chance to load, there are a bunch of horizontal lines that appear on the screen and it just freezes. Occasionally I get a BSOD, though, it looks like a green screen of death. I get a msg that mentions a problem with the file nv4_disp.dll. It says something about being stuck in an infinite loop. I wasnt able to get into windows except through safe mode with networking. I've tried some of the fixes that I found on this site and others and none of them worked. There were a few times where the problem appeared to be fixed until I would try to play Lord of the Rings Online and then it would get all fuzzy and freeze up. I talked to someone at Dell and that person told me I'd have to reformat and reinstall windows. If anyone knows a way I can fix this problem without doing that, please inform me.
