[SOLVED] LG TV: Bluetooth connected but no sound

[TheOldPresbyope]

Hello,

I have raspberry pi 3b

...

Truly a Pi 3B and not a Pi 3B+?

Are you using both the WiFi and Bluetooth interfaces?

As soon as that model was released reports started showing up  on the Raspberry Pi Forum about its WiFi and Bluetooth not working well together. Not everyone had a problem and not everyone who did saw the same behavior. There was lots of speculation but I don't know that specific issues were ever resolved at the software level.

There are some steps you could take to see if this is the cause of your problem.

1) try using an external Bluetooth adapter. You have to disable the internal Bluetooth interface in moOde's System Configuration menu. 

2) alternatively, try using an external WiFi adapter. You have to disable the internal WiFi interface in moOde's System Configuration menu.

3) alternatively, try connecting to your local area network via the Ethernet interface instead of WiFi. Again, you can disable the internal WiFi interface in moOde's System Configuration menu.

Diagnosing Bluetooth problems from the command line without proper "sniffing" tools is tedious even for experienced Linux programmers.

I use later model Pis with 5GHz WiFi connections and a variety of either Bluetooth sources (e.g., smart phones, tablets, etc.) or Bluetooth sinks (e.g., speakers, headphones, etc.) and have no problem with the Bluetooth connection.

Regards,
Kent