There are several steps to troubleshoot the sound issues on a Smart TV.

1. Check the volume level and mute settings.


2. Unplug and then plug back the power cable.


3. Reset the TV by pressing the reset button on the back of the TV.


4. Reset the audio settings on the TV.


5. Ensure that all TV audio settings are on the correct input.


6. Re-synchronize the soundbar to the TV.