Here are some steps you can take to address audio issues on your Smart TV:

1. Check your TV’s audio settings to make sure the volume level isn’t set too low.
2. Check the audio cables connecting the TV to the sound system to ensure they’re securely connected.
3. Remove any other audio equipment connected to the TV to see if that eliminates the issue.
4. Turn off all audio processing options on the TV (like surround sound, TruSurround, etc.) and switch to stereo mode.
5. If the audio issue persists, try performing a soft reset of your TV.
6. If audio issues continue, you may need to reach out to a repair technician.