See attached photo of what convergence board in your set looks like and the chips that fail; it is directly behind front panel beneath the screen--access from the front.
I can tell you exactly how to get at it and what is involved in the repair---TOTAL PARTS COST ON EBAY will be under 25 dollars.
If you want assistance and this information and the photos helped you rate this solution as very helpful.
I have done dozens of these sets with the same problem.
SD TECH
view of board removed from set--back side; note the two black chips to the left.
view of board removed from the front side.
View of board from back side; note the two chips and the protect resistors just in front of them.
sd tech
PCB's when available,are expensive.Replace convergence IC(s),
re-adjust and you are good to go!
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