Thanks for that information,
These sets of this model have a batch of bad capacitors in them causing this issue.
Its a known issue.
They seem to fail prematurely.
If you have electronics knowledge and the equipment you could locate the bad electrolytic capacitors and replace them. But if not you will need to have this set serviced professionally.
Best Buy and Sears are tow excellent places to have this service done.
They are both fair priced and honest as well;-)
I wish I had better news for you on this , I really do. This is not just isolated to just one circuit board.
In any case, I will stick with you until this is complete.
Please rate my service kindly.
Also it is the only way I am credited for my time and expertise with you.
Once you rate, I will be notified and will add your question to my priority list so you can reach me anytime until this problem is solved.
Then you can reach me by simply replying to this message anytime.
Thank you and have a great day!