Onkyo TX-NR777 receiver, Samsung TV, and Fire(box) - hooked fire TV up to internet (ethernet), power, and one HDMI from Fire to receiver (HDMI in), one from receiver to TV (HDMI out).
TV control now has ability to indentify Fire TV, and when Fire TV source is selected, able to use Fire TV remote to Navigate. Receiver used to control sound source.
Summary: Receiver controls sound, TV controls source, Fire remote controls content.