This could have something todo with the fact that TVs run on a lot lower frequency. If you switch to TV, de vert sync. is set to 50 or 60 Hz or something like that. It might be possible that this isn't set back properly to 80Hz (or whatever your monitor supports)...
This is a very long shot though, so don't kill me if this is wrong
![:p](images/smilies/msn_tongue.gif)