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

Screeching sound after "Wake-up" Roku Ultra

When the Roku goes to sleep (aquarium screen saver), when you wake it up, you get a terrible screeching audio.  Screeching continues no matter what you do except if you reboot the Roku or do a Settings>System>Restart.  Audio is then fine until it sleeps->wakeup again.

I have a new Roku Ultra model 4800X (sn S02A209NT8CN), Fiber, Cat-5 and LG TV.

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Level 20

Re: Screeching sound after "Wake-up" Roku Ultra

Make sure you have passthrough mode enabled:  Settings/Audio/HDMI="Auto passthrough"

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