In order to check if the sound is not coming from the TV:
Check if your TV is connected to a mini PC, Ensure the cable is firmly connected TV is set to the correct input.
Clear the weekly Caches to run or play the sound smoothly.
Additionally, you can look at the settings:
Go to the "Settings".
Click on the "Account settings".
Click on the "Display Settings".
Check the "Display screen Tune".
Click on "Save Changes".