I just cut the cord and purchased a Fire TV. I have a Sony Bravia KDL-46X-BR2 and a Yamaha RX-V659 receiver (both pretty "old" I know..). The Yahama is old enough that has no HDMI ports. Fire TV into TV's HDMI-1, and optical audio out from Receiver into TV. When I have the TV tuned to my OTA, I get surround sound from my Yamaha. But when I switch to Fire TV I get no audio from Yamaha. Can someone help me with what I am missing?