I am at my whits end and I am hoping someone has any suggestions before I throw this thing against the wall. =) I am running a Samsung H5500W through an Optical Cable from the receiver to the TV. I have multiple devices that all work flawlessly with my surround. The new ATV4 refuses to output anything from my back speakers unless I specifically set it to Dolby Surround. I'd be fine with that but unfortunately anything without dolby is silent. I've spoken with support and have been escalated all the way to engineering and no one has any ideas. Engineering seems to think my television is the culprit but they've no ideas to "what" to blame on my TV. (It too is a Samsung) Has anyone else experienced any similar issues? Any suggestions on getting surround to function? Am I just SOL? I rather not go back to the 3 but at least that has an Optical!