I was just getting ready to post about this. Set up a new Roku Express 4K+ today. No problems with set up. My channels all loaded fine (I have three other Roku boxes). When I click on Netflix, Disney, Classic Reel or any of my favorite channels, they open up just fine. It's when I choose an episode or movie to play and it is totally black. I can even see the (TV-14) (TV-MA) wording at the start of the movie in the corner. I even tried The Weather Channel which I get as part of my Xfinity subscription and can use the up arrow to choose "My Weather" and get the local radar and forecast but I only get a black screen when trying to watch the live TV. Does this have anything to do with the fact I don't have a TV with 4K? I have other boxes capable of streaming in 4K but they still play. It's very strange. No sound either when I chose a movie to watch. My download speed today when I checked was over 100mbps.