Screen flashes back and forth between black screen and picture..it
Black flashing picture on HDM12 and wifi only, regular tv cable is fine
sound like either a bad main board or a issue with the firmware. You may have to check you firmware version first. Of course try to reset your TV. Unplug ALL inputs, sounds bar etc. Then unplug the TV. Hold the power button reset for 1 minute or so. (or leave the set disconnected for longer. Then connect one video source. Preferably a local HDMI source (Game Console BR player etc. but skip your cable/Sat box) then plug the TV back in and see what it shows and if that made a difference.
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