Hey, @HeathCliff.
Thanks for reaching out!
You may need to disable the screensaver on the Roku device by heading to Settings > Theme > Screensaver Start Time > Disable screensaver.
After that, set the Auto-start setting on your Backdrops. While displaying a Backdrops Image, Click the * button on your remote to control it, and scroll down, choose (Auto-Start) then set it to 30 minutes. Please note that this is the earliest time available at the moment.
After 30 minutes after the Roku device goes idle, backdrops will automatically launch.
For more info, click here!
Roku Community Team
Emmanuel-D.
Roku Community Moderator