We're having the same problem with our MU8000. Since it is out of warranty, Samaung told me the cost of repair is about 80% of the purchase price. It seems to be a very comnmon problem with this model and I think they should have done a recall or fix the repair at a nominal price. Our TV is only 2 1/2 years old. Our older Samsung which is 7 years old works perfectly..This is a lemon.
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