I have XP SP2 and Vista RC2 installed. Recently I came home to find the monitor in standby mode as if it was not receiving a signal, but the internet radio station I had up was still playing. I restarted XP but the screen goes black when it tries to load the welcome screen. Vista does the same screen, showing the loading screen but going blank at the login. I can boot into safe mode in both OS's. Also, I can boot an Ubuntu live cd and haven't had any problems. I'm usually pretty good about sorting these types of things out but so far I'm stumped. Thanks for any suggestions.