I've just got a new telly, and I've come to hook it up to my computer (a VGA cable going into a VGA -> DVI converter). It all works fine up until I reach the Welcome Screen (I'm on XP SP2), at which point the TV goes back to 'No Signal', and my monitor works fine.
I've tried swapping my monitor and TV around in the plugs, aswell as just having the TV plugged in when I turn it on, but I've had no luck.
Help me, you clever devils, and I'll love you until I stop caring.