- Check that all cables (HDMI, power, optical, etc) are properly connected and working.
- Verify that the TV has the latest software version installed.
- Check the audio settings and sound mode to make sure it is adjusted correctly.
- If using external speakers, verify that these are connected properly and verify volume level.
- If sound issues persist, reset the TV back to original manufacturer settings.
- If the issue still remains, contact the manufacturer for further assistance.