I upgraded to XP about 2 months ago and immediately after setup had finished I started having display problems. I did a clean install of XP, once it started to boot up for the first time my monitor went black (no signal) and my keyboard/mouse lights went out as if it wasn't detected. I called the Microsoft hotline for installation and they couldn't really help me. I could get it to work only in safe mode. Somehow,, it finally started working. Don't ask me how,, MS didn't tell me anything I hadn't allready tried and I don't know of anything I did differently when it finally started working. Now, I was working on a monitor for a friend,, and I hooked it up to my computer to burn it in and after 5 minutes of on time the same thing happens with it. The monitor will turn black (no signal) and keyboard/mouse will lose power. I've updated all my video/keyboard/mouse drivers and updated all the updates on the XP update site. I'm using a ATI All in wonder Radeon DDR AGP video card. Also with this vid card my TV tuner locks my computer up every time I try to open it. I have removed the card and booted using my built in vid drivers and then reinstalled the ATI,, this didn't help. Thanks if anyone has any clue as to what to do or has had any of the same problems.