re: Sony TV / Vizio Sound bar Issue? Update

Starting to look like your TV's ARC port has crapped out. A Factory Reset may restore it, but from your troubleshooting it looks like you have tried everything but a different sound bar. Do you have a sound bar on another TV that you could try with this one? Seems to me that is the last step before the dreaded Factory Reset on the TV. I'd also unplug the TV from the outlet for at least 2 minutes (do this to the sound bar at the same time), then plug back in and try it.