I just now returned the Pioneer to the Goodwill store. Further testing revealed that there was no audio from any of the HDMI inputs. Really good looking video, but no audio.
I also noted that the unit would not stay in standby mode...the blue led in the power button would go out in a few seconds.
Now to start research on a new/newer AVR - the Denon doesn't do 4K but otherwise works just fine.
Ted