It was either a bad motherboard (class action lawsuit) or a firmware fix. Samsung just issued an update to the firmware but my tv is boxed up in the crawl space so I can't test it. If you can, let me know if it solves your problem permanently. I had to put another tv up in the bedroom to replace my 50 inch UHD. I bought a 50 inch Crystal UHD. It is junk. Bloated with junk apps and a propensity to inform me that I hae no internet connetivity. I miss my UHD. Hated the volume control issues. BTW, I have two other UHDs (both 55 inch). They are fine. I turned off the update function just in case Samsumg is trying to kill those too. Why did I ever move from LG?
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