Have a weird issue going on with my 55C6P - in HDR something is very wrong with the black level. It's set too high and so any dark scenes look terrible and just wrong. I also own a 55B6P and when using my Samsung K8500 to play Ultra HD Blus with the exact same cables and settings across the board, HDR looks beautiful on it. Take the same player, cable, and settings to the C6P and it looks really bad. Daytime/bright scenes look fine, but any darkness and I can see the blacks looks mostly grey and then there's spots of total black crush. The B6P exhibits absolutely none of these issues.
When I watched the Ultra HD of John Wick, it looked terrible. I could see artifacts all in the dark areas on screen. It was a mess. But playing it on the B6P, it looked beautiful.
I'm curious if anyone else has experienced anything like this. I tried all of the HDMI inputs, checked HDMI Ultra Deep Color settings, did a factory reset on settings, put the latest firmware on it, triple checked all the settings and nothing helped.