Changing Sound Output on a PC
Click on the “Start” button and then click on “Control Panel.”
With the Control Panel in “Control Panel Home” view please click on “Hardware and Sound.”
Then under where it says “Sound” in green letters, click on “Manage Audio Devices.” This will bring up a window labeled “Sound.”
Click on the “Playback” tab. This will list the sound options available to you. You’ll likely see that your PC Speakers are selected (green check mark sign):
Click on TV (Samsung in this example) and click on “Set Default” button. There should now be a green checkmark next to the TV.
Sound should now play through the TV.