Playback Issues - Audio/Video & Power

Help with audio & video playback issues, TV display type recognition & compatibility, HDCP messages, troubleshooting playback errors, advertisements, and resolving power issues.
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Level 7

Roku Soundbar video feed Blinking Black

Model 100002421 SoundBar onn. 

After last update screen blinks out to black and back to video on 2 second cycles. Power cycling by unplugging and plugging back in fixes until next time I watch tv. Performing a master reset allows it to work for a day, maybe a day and a half. Then the problem returns. I have tried different hdmi ports and even bought high-end hdmi cords. None of the current solutions in the forum have worked; I’ve tried it all. 

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