Help with video signal dropout
I am confounded by a problem I am experiencing with my home theater setup. I have a Philips BDP7502/f7 4K blu ray player feeding into a Denon AVRX6300H receiver (via HDMI). The Denon feeds into a Vizio M75-E1 (via HDMI). All of this was purchased in early spring 2018.
At first everything was fine. However, after a few months, we started to have an issue where every so often while watching a movie, the TV will lose the picture for one or two seconds (on average maybe once every 20-30 minutes). The sound would still be transmitted by the AVR. I have noticed that sometimes when starting up the system and loading a movie (either a 4K or regular blu ray), the problem is really bad. Under such "bad" circumstances, the screen will black out for one or two seconds every ten seconds or so. Usually, turning the Blu Ray player off and back on again solves that particular problem but we still encounter the occasional loss of video signal during the movie.
Since the sound signal is never lost, I assume that the problem is related to HDCP and loss of handshake, but I haven't been able to figure out a solution or find a similar problem on any forum. I have made sure the firmware is up to date and have also tried swapping out the cable from the AVR to the TV without any effect. The HDMI cables I am using are advertised as being able to handle 4K/HDR, etc.
I would appreciate any suggestions on other things to try to resolve the problem.