I have had the exact same issue with my UN43NU7100f... FOUR TIMES!!! We have 9 of these TV's we purchased for our restaurant and I'm just counting the days until the next one goes out. Two of the four TV's to go down did so within 7 days of each other. It's like they are on a self destruct timer. Three weeks later the 3rd one went out. and now just three months after that, the Fourth one has gone out. This is absurd. I will never by another Samsung screen again.
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