[zenithfan1]

I would reflow the solder on the boards suspect of trouble and go from there. Only add some solder if it's necessary. Sometimes the problem is the pins the module plugs into and that bad connection causes problems like you have. Be sure to clean them with some de-oxit, plus the sockets on the modules they make contact with. I really don't know an easy fix for the overscan, it's a common thing on older tvs, it allows some movement or shrinking of the picture due to voltage changes and parts drifting. People complain more about underscan, I think that's why they did it. Less service calls I guess.