Denon X3700H, LG C9 and Xbox One
If you are on the bleeding edge have a 8K display and want to connect it to a 4Kp120 video source like the new Xbox One it is not going to work. There is a problem with the chip inside the Denon X3700H AVR that blanks the screen.
The megaloth conglomerate that owns Denon and Marantz have a free dongle that fixes this problem. You just need to fill in an online form and they will send you won.
Welcome again to the bleeding edge 🙂 And 120 Hertz gaming on a 4K display!