Thx again, Brad. Yes, you are correct. The OSD does show on the 4K Sony DVD menu screen but does not show up when playing a 4K UHD DVD. I tried setting the ATV to 1080p and it still doesn’t display. Maybe I should have restarted everything to see if it might display the OSD but I didn’t.

Oddly enough, after that testing session I changed over to the Xfinity 4K and the OSD displayed. Have no clue what might have triggered that. It hasn’t displayed there in many months. Still working the next day. On the Xfinity box, there is a graphic which shows that UHD is selected. Within this graphic is the display and it says Undetected. I guess because it can't really see the display as it is not directly connected to the TV.

Well, a new receiver might be in my future. While talking with Pioneer a few days ago, they felt one of their latest models would likely display the OSD but also said they couldn’t say that definitively. Still too many wacky HDMI things happening.

Thx Dave