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I take it this is a projection TV. so they use three lensed CRTs red green and blue. you should have a setup screen that projects a grid pattern. red green and blue. there is SOMEWHERE a adjustment that overlaps the three projected grid patterns. Making a WHITE single grid pattern. red green and blue make white light. Pin cushioning is the bowing. you may find a POT to adjust on the back of the set. I have no idea what set you have. Lastly.. Pin cushioning can also be caused by faulty flyback transformers. Hope I could help.. new here LOL Happy Fixing =)
This is an indication of convergence issues. There are two ic chips that control this and there is a likely hood of there failure and need to be replaced. there possible other issues with ouput resistors and fuses. At my shop the cost to replace these chips are 200 to 350. not a too difficult repair.
convergence is the problem. first question do you have convergence in the customer setup menu. if you do not it could be a special small fuse if you do have "convergence" in the setup menu then you most likely have a convergence power board issue. and generally they are replaced. in our shop such board replacement average 124 labor and about 100 for part. if the fuse bout 15 for part and 80 for labor. there are solder connection that cause the blown fuse