I've had my HDTV for a while, and have been able to see the entire screen for the longest time. There are resolution options on my TV (Full, H-Fill, Zoom, etc.) But now, even on full, I can't see the entire screen. This is a real problem with football games, subtitles and stuff like that. Any help? I've looked through the manual and haven't found any answers. I'm considering going to where I bought the TV (Best Buy) and asking them, but first I want to see if I can get an answer here. I'm not very TV savvy, so try not to get too complicated, thanks.