Well I got a weird one! I have a ATI 2900XT 1GB GFX card and its absolutely fine when plugged into a VGA monitor or merely through a VGA cable its just when I use the DVI connection that it starts going weird. If I start up the PC with the monitor on (and I have tried 2 different monitors) I get blackouts and what looks like interference - tiny white kind of specks and lines moving across from left to right and vice versa. But if I wait until windows has totally started up and then turn the monitor on its totally fine! I cant work out why! If I do get this problem it seems to be rectified by unplugging and plugging the monitor back in to the GFX card! I am pretty sure its to do with the GFX card but its hard to work out! Any ideas? thanks!