To troubleshoot your Smart TV’s inability to display audio from a specific streaming service, you should follow the steps below:

1. Check the audio settings on your Smart TV. Adjust the audio settings, or switch to another audio setting that may be compatible with the streaming service.
2. Verify that you are using the most recent version of the streaming service.
3. Check the volume on the streaming service and your Smart TV.
4. Check that the correct HDMI cable is being used and that the connections are secure.
5. Restart your Smart TV and the streaming service before troubleshooting.