I have a Samsung TV with optical output connected to the AVR-3313CI, and it works fine on the Main Zone (although the intermittent output still persists). However, I can't get any audio from this source to be output in Zone 2. I can't see anything in the manual about optical being unavailable in Zone 2. And, since the source TV Audio shows up, I'd assume it would be fine.
Am I missing a setting? Or is this just another issue with my AVR-3313CI that I'm becoming convinced is a lemon?