You likely need to replace IC 7001, & IC 7002 convergence IC's
STK392-110, & don't buy cheapy ones, as they may not last. Also, check
the low value resistors right by both IC's. Make sure you clean off the
old heat sink compound, & use a generous
amount on the IC's. You will likely see the large IC's on the left side
looking from the
rear. If you try to adjust the convergence, especially the service
menu, after you fix
the T.V., you will have a lot of adjusting to do. Hope this helps, Dani.