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

White flashing dots on screen with new Roku Ultra

I upgraded a Roku I'd had for many years for a new Roku Ultra Streaming Media player (since it had an ethernet port so I could hook it up to my cable directly). I was having issues with playback being pixelated at times.

For some reason, when the screen is ever black, I would see white dots like sparkly stars or snow or something but now I'm starting to see those blinking dots during movies I'm streaming. Any idea what's causing it or how to fix it? I didn't have this issue with the old one I had that I used to use through wifi. Thanks!

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