Solving playback issues

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 9

[OS 10.5] Can't Screen Cast!!

Ever since the 10.5 update. I can no longer screen cast. Is anyone else having this issue? Any ideas how to fix it? I found a temporary fix, but I would rather find a permanent solution. Unplugging it for 20 seconds, and restarting the Roku tv helps for the day, but if I want to screen cast, I would have to keep "soft rebooting," or whatever you call it. This won't mess up the TV will it? I'm at a loss, on how to get it to screen cast again. It's basically not detecting my TVs for some reason. I have 2 Roku 3 TVs, I never had this issue, up until the update. Everything was working fine, up until now. HELP! 

Level 7

Re: [OS 10.5] Can't Screen Cast!!

I'm having the same issue with my Hisense Roku TV. It won't even work when I restart the TV.