Facing TV Problems? Ask a TV Technician.
You can't use the Bluetooth to pair your soundbar to the TV set. You have to connect it using the optical audio output for sound. And if you have a Panasonic soundbar with its own Bluetooth receiver..you have to connect it to its respective transmitter whether its an amp or standalone Bluetooth transmitter that came with the soundbar.
LG's Bluetooth is only for pairing the LG remote.