I'm having this problem on UN46EH5300. It just started today and the black screen flashes are getting more and more frequent until now they are only a few sEconds apart. Sound is fine. Screen goes black for a sEcond or two then comes back for a few sEconds. I tried factory reset but that didn't help. I turned off the Eco sensor, but that didn't stop it, either. I'm hoping there's another answer. My internet and wi-fi are working fine elsewhere. This happens in tv, smart hub, and firestick modes.
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