If it's working now my only idea is to do this -> http://reviews.cnet.com/4520-11319_7-6240575-1.html
I was checking my Vista PC for errors. Error checking ran fine in stages 1-4. In stage 5, monitor went dark, cooling fan runs high speed and after 2 hours, I see no results (or anything else). I did hear the Vista startup jingle about 15 minutes ago, but still no video. I ran the same process yesterday and after 2.5 hours I hard powered down with power button. PC, otherwise seems to be performing ok. Ideas??