I have a Home Theater consisting of a Denon AVR-X6400H receiver. The inputs to the receiver at FIOS cable box, Apple 4k TV (streaming device), and a Oppo Blu-Ray player. The Denon receiver outputs to a 8K Samsung 82” 8K 900RB TV. The speaker arrangement is 7.2.2 with speaker on the floor and in the ceiling. Everything is wonderful until I upgraded the Denon 4k receiver to the new AVR-X6700H 8K Denon receiver. The setup went fine, but when the system is turned off for a hour or longer, their is a problem with turning the system on. What happens is the TV shows a blue screen telling me to power on the input device. After many discussions with Denon and Samsung, the problem is with the Samsung TV. In fact if you check the FAQ’s it shows a similar problem in 2018. What is happening the EDID HDMI handshake is not happening between the Denon and Samsung TV. I have all new Belkin Ultra High Speed HDMI cables on everything (rated at 48 Gs). The problem was finally resolved by a firmware upgrade by Samsung. And that why the legacy Denon AVR-X6400H works. Samsung is no longer interested in supporting avatar receiver based system unless audio is feed back to the receiver via the arc port. Problem with this is the TV only supports 5.1 speaker arrangement and non of the new sound formats. I have been arguing with Samsung that a true home theater is not designed to work in this manner. After more then 2 dozen chats and phone calls I have not been able to get anywhere. I tried emailing the CEO of the company, but email addresses are not where to be found. Any idea’s how to make the system work with the new crop of receivers by Denon and Marantz.