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

Glitchy picture

Have had the system for about a year and since yesterday I turn on my Roku Plus device and the picture will be ok for a minute or two then goes glitchy (horizontal colorful lines). Does not matter what app or if it is on the Home Screen. Already checked all of the cables twice and everything is fine. Every gaming consol and blue ray player we have works fine so definitely something up with the Roku. Any ideas?

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