I am the right person to talk to.
If convergence problem total parts cost on EBAY would be under 25 dollars AND I HAVE START TO FINISH, STEP BY STEP INSTRUCTIONS FOR THE DO IT YOURSELF PERSON TO DO THIS REPAIR.
THE instructions tell everything you will need and the best way to get at the two STK-392-110 CHIPS THAT NEED TO BE REPLACED.
Repair involves getting at and replacing both chips, it does involve being able to solder--not hard on this set.
If you want the instructions here or provide a email I will if you rate this solution very helpful give them to you for free, they are based on my actual experience doing hundreds of these sets with this problem.
See attached photos of what the chips look like and what a typical convergence problem looks like.
The black parts are the chips, this is Hitachi but EXACT SAME TWO CHIPS ARE USED.
Typical convergence problem; no two will look exactly the same.