Hi Jim,
Thanks for responding!
I've tested with RO Standard, yes. Tried with and without hardware acceleration, with and without bit streaming, etc. Tried multiple configurations.
Tested with a new hi-speed 4K HDMI cable - and, I tested with an older one (the one that's attached to the old system).
I'm testing with some ST:TNG blu-ray rips I did years ago. I've also tested with other files with different audio tacks (AC3, DTS, etc)
It actually breaks up with just the MC Theatre View screen up - so, even before you try to play a file. Totally weird.
I ran it for 12 hours on a regular ACER Monitor and it's fine. But, if I run it through the home theatre, it starts breaking up within 1 minute. If I use the exact same cable and hardware on the older machine, everything is fine through the home theatre.