Look for an option called " Sound output device, " " Audio device, " or similar. Ensure that you've selected your TV speaker as the output device if you want the sound to come from the TV. If you're using a soundbar or some other device, choose that instead. 3. Check if Your HDMI Device and Cable Are Working Correctly. Vizio Remote Volume Not Working: Turn on your TV and press the volume functions on your remote. If the TV is not responding to the remote control, then try replacing the battery in the remote. If changing batteries does not work, then, unfortunately, it is time to get a new remote. Vizio TV Not Responding to Remote or Buttons: Check the Volume Levels and Mute Status: Your TV's volume levels may be too low or muted. So, take your remote and unmute the TV or increase the volume all the way up to the audible level. Try Swapping the External Speakers: The external speakers you are using with your TV may themselves be faulty, and you may run into a problem. Connect Check to ensure the TV is on and the volume is turned up. If the TV is on and the volume is turned up, but you still can't hear anything, check to see if anything is blocking the TV's speakers. If the speakers are clear and you still can't hear anything, try plugging the headphones into the TV and see if you can hear anything that way. Make sure it is set to TV Speaker. That will ensure you have at least some speakers connected. Try again and see if you get sound. If yes, you're done. If no, there may be more than one volume setting to check: Check the volume setting on your cable box. Method 2: Customize Audio Settings. One of the first things to do when there is no sound on one channel of your TV might be to check and customize your TV's audio settings. To do this; Tap the Settings button on your remote. Go to the Audio Settings option. Find the SAP option and check if it was enabled. Select Disable SAP. .

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