Buzz bought an Amazon Fire Stick and has an old Yamaha Receiver for it, but it doesn't have HDMI. He's managed to connect it, but he gets no audio. Leo says that most TVs have one HDMI/ARC. That's the Audio Return Channel. He wants to plug the FireStick there. But he also wants to also use the optical connection for sound. That's what Buzz did, but it doesn't work on the Firestick. Everything else is fine. The audio settings may need to be changed. Look at the TV setup. Try using the PCM Audio setting.
Amazon Fire TV Stick
Kevin got an Amazon Fire TV Stick for Christmas and he's having issues connecting to it using Miracast in Windows. Leo says that Miracast is a Wi-Fi technology that essentially sends HDMI over the air. Android 4.2 or newer has it built in. Windows 8.1 also natively supports it.