Unplug wait a few minutes, plug in and then test. If it fails, call Samsung for what next.
They should check firmware versions, factory reset and remember I can't guess if you have something odd in the USB or other ports.
My Samsung 55" curved tv recently started freezing. I can't turn it off, change channels volume etc....
If I unplug the unit it will automatically start and all the controls will work but only for a few minutes and then it freezes again.
If I try changing the volumenothing happens but in a couple minutes the volume may click up by one.
Any help would be appreciated.

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