I am having intermitent convergence problems with my Mitsubishi. I live in a remote area of Missouri, and the closest service center I have found is 120 miles away. He told me I would have to bring him the set and that it would cost $600 - $800 to fix it. He suggested I

would be better of just replacing the unit. I am fairly handy (not a certified tech by any means) is there anything I can do myself to try to fix this?
I read several posts about resoldering the chips to the board and checking connections and fuses, but when I plugged the set and removed the back I could not determine the location of the convergence control circuit board.
Any help would be greatly appreciated.