Samsung QN65Q80BAF E-Manual page 217

HDMI (eARC)
HDMI
If no sound comes out of your Sound Bar, and if it is connected to the TV with an HDMI cable, check the HDMI (eARC)
connector on the back of the TV.
HDMI
HDMI (eARC)
HDMI
If your Sound Bar is connected to a receiver, and the receiver is connected to the TV using an HDMI cable, check the
HDMI connector on the back of the TV. The cable must be connected to the HDMI (eARC) port on your TV.
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