Hey all! I did some searching and couldn't find an answer to this problem. I recently purchased a Onkyo TX-NR656 to with my Samsung KS8000 TV. I primarily run a PS4 pro as the only signal, but I recently realized that I had it connected to a non-HDCP 2.2 HDMI port which was not allowing for HDR on the tv. I physically switched the HDMI cable going to one of the three ports on the back that support HDCP. I also enabled UHD color on the TV for the corresponding HDMI port, and this is where things got a bit screwy. The receiver will find the signal, however it will almost immediately cut out and go to a blank screen. For the moment that the receiver does have the signal showing on the TV, it does show that the 2k/4k support is enabled with HDR. I tried rearranging the the cables and trying different ports, but the same thing keeps happening. I also tried enabling and disabling HDMI CEC on both the receiver and TV but this does not seem to have any sort of impact on the situation. I do know that if I connect the PS4 Pro directly to the Samsung One Connect device for the tv, I can achieve 4k signal and HDR, but I would have to run the audio through an optical cable which I would like to avoid. Does anybody have any suggestions? I'm sorry if my post is not technical enough, as these are new items for me and I am new to having a receiver with all these bells and whistles.