I have 3 of these, and the last east one is the only one I had any issues with (screen stays backlit black, no menu or video). Contacting support now since it’s within warranty.
These are great TVs to mount, and use for HDMI inputs. I’m not a fan of the built-in menu or apps for regular usage, though, they are a bit clunky. You can setup a default input, so using it for an AppleTV, or other streaming box.