Thank you for this. I tried a ton of other routes but this did it, working great now connected to my Yamaha and new TCL TV. I was focused on the issue coming from the TV or Roku, but it’s the receiver that needed attention / updated.
I just purchased an Onkyo surround system w/9 speakers. Everything works great except when I attempted to hook up the Roku TV. Using HDMI I am hooked from the ARC port to the TV Output port as directed in the Onkyo manual. No sound.
Even after trying the HDMI in the other 5 ports ... no sound.
Thank you so much. I'd been searching for a fix for over an hour until I came across this and it did work!!