I'm experiencing bands of color (green, yellow, purple) around the perimiter of the picture, 2-3 inches wide and maybe a little more in the corners. Center of picuure appears normal. Just started doing it yesterday. Don't have the owners manual or remote anymore. Otherwise, the picture is ok. I've seen one other user on a different forum that had a similar problem, but didn't see any responses.
This is a deguassing coil problem, each time the set is powered on a current passes through a coil around the pic tube to demagnetize it. One one sony I fixed it was just some bad solder joints around the thermistor. The thermistor can be found near the ac fuse. It's usually a small black square shaped box.
It could also be a round shaped disc with 2 legs. You will probably have to remove the chassis to make repairs. You should be familar with soldering because it's easy to destroy a circuit board. See my article beginner's guide to tv repair on this site to learn more.
brian
los angeles, calif