Every time I start up the AppleTV 4K, I get a message on the screen with two selections, “Try HDR” and “Not now”. I try and use the remote to select one of the options, but the screen is completely unresponsive to the remote. The only way around this screen is to physically power-cycle the device, after which the normal menu screen appears. Video is set up for 4K HDR 4:2:0. I am using a new certified high-speed HDMI cable which has been working fine for UHD/HDR with my Oppo 203. The AppleTV 4K is connected to a Marantz 8802A, which is connected to a Sony X940D. All components are UHD/HDR compatible. I am not using ARC on the Marantz. This is really annoying behavior, having to power-cycle the device every time. Is there another thread that discusses this issue and possibly a fix?