SmurfOnABoat said:
This is fairly common on the Toshiba's usually starts around the 2 year mark of use. 9 times out of 10 its a bad board, video processor or power supply. My vote goes for a failed board, this usually is caused by poor cooling (not your fault) but sometimes personal use and wall mounts and/or positioning too close to a wall will cripple the already poor cooling.... You could have a tech come look at it, but I think you are kind of stuck with a bad unit.... Hope this helps and good luck...
Gah. Figured as much. Yeah, the TV goes back a few feet (it's a monster, and the weight matches its size), so no way I could wall mount it... and there's about a foot and a half separating it and the wall.
Thanks for the info, I can't recall how long we've had this TV, but it's definitely been more than two years. What I said about the spots being there since Day 1, I'm now starting to doubt it, as I forgot how long we've had it.
I won't bother with a tech. Too much money to tell me something I already know. When I eventually get an HDTV (or even 3DTV), whenever that is, I'll be able to replace this faulty unit with something that's much easier to play games on (and read text; not even the Wii's web browser looks right, and you can imagine games designed for HDTVs...).
Thanks again for the help. I won't mark a Best Answer yet, just in case anybody has any other info to contribute.