I have an older Samsung plasma 51" tv. On the digital audio out, I have a Bluetooth transmitter, sending the audio to an RCA soundbar across the room. I've been running this setup for about two years with no problems. Yesterday I lost audio. I booted the transmitter and let it reconnect, still no sound. I had the TV on my local antenna at the time. I switched the tv back to internal speakers and continued to watch tv. A little later, I switched to my ROKU to watch some Netflix. I immediately noticed echo on the sound, as the internal speakers and the Bluetooth soundbar were both working. I turned off the internal speakers. Later I switched back to the local antenna, no sound. What would cause this problem? The output from the tv is not being changed, just the source? How would that cause the Bluetooth setup to fail? Any ideas?