1. Check the HDMI cable connections to ensure your TV and audio receiver or sound bar are firmly connected.

2. Make sure the volume of the TV is not set to its lowest volume or muted.

3. Try adjusting the audio settings of your TV to have the most or optimum sound experience.

4. Make sure you are connected to the correct input on your audio receiver or sound bar.

5. Check that the audio receiver or sound bar is powered on and the volume is set to the desired level.