I don't have much experience with scalers so I've been having problems trying to obtain a 1080p output on my Iscan HD to my Sony 46W. I have managed to get a 1080p output 3 times but what usually happens is the screen goes blank when I attempt to change the resolution output from 576p to 1080p or any other resolution for that matter. When I have successfully managed to output 1080p from the Iscan, if I change to another AV input or switch off the TV, the screen goes blank again so I have to revert back to 576p. The screen then refuses to accept any other resolution other than 576p. I have the Iscan connected via DVI-HDMI but I've tried to output the Iscan via VGA as with my previous TV but I can't even get it to do that. I'm not sure where the problem lies and what I should do to fix it so if anyone can be of any assistance I'd be very grateful!