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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winelover
Level 7

New Roku Ultra, day after original set up (everything worked) now has blank screen after booting up

New Roku Ultra, day after original set up (everything worked) now has blank screen after booting up. My TV says there is no HDMI signal. After reading community notes about screensaver problem problems I suspected the picture gallery screen saver might be the problem.  I pushed the reset button on the bottom and the Ultra rebooted and then the home screen appeared. I then was able to switch back to the Aquarium screen saver from the 4K picture gallery, and then did another reboot.  Now the Ultra boots to the home page OK and I can open channels and stream.

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