On Monday, October 16, 2006 @ 11:30 PM, I wrote: <snip> I'll try unplugging and re-plugging the video card... <snip> Well, it's been a week now and no more video problems. Looks like pulling the video card, vacuuming out the slot, wiping down the connectors on the card, and putting it back in was all that was necessary to fix the problem. I guess a little dust somehow got in there and caused a bad connection. Hard to believe that's all it took to fix it. Anyway, in future if I have any problems along this line and doing that doesn't fix it, I know what to expect a technician to check (power supply, CMOS battery, connections all around, etc.), so I did learn a great deal from this thread for down the line. Thanks to all who provided input on this problem. Greg Wallace