Roku Device Features, Settings & Updates

Help configuring Roku device settings, using Roku OS features such as screen mirroring, adjusting display type and audio settings, using Guest Mode, and assistance with software updates.
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Level 7

roku stuck on bouncing letters


 I have had a Roku 3 for a 4 years.  The screen is stuck on the bouncing Roku.  I did all the proposed solutions in the community discussions but the remote doesn't work and I cannot access anything.

 I see that the problem was raised by several person but I did not see any real solution.

Thank you for your support.