Vizio SB4021M-A1, Quick Start Manual

TECHNICAL SUPPORT

There is no power.

• Press the 

POWER

 button on the remote control or on the top of your Sound Bar. 

• Ensure the power cords are securely connected. 
• Turn the Subwoofer power switch to ON. 
• Plug a different device into the electrical outlet to verify that the outlet is working correctly. 
• To conserve power, the Sound Bar shuts off automatically after 30 minutes if not in use.

There is no sound from 

the Sound Bar.

• Increase the volume. Press 

Volume Up

 on the remote control or on the top of your Sound Bar. 

• Press MUTE on the remote to ensure the Sound Bar is not muted. 
• Select a different input source (Analog, Coaxial, or Optical). 
• Be sure the audio cable coming from the TV is connected to an audio output, not an audio input. 
• If listening to a USB source, be sure the files are in MP3 format.

I hear buzzing or 

humming.

• Ensure all cables and wires are securely connected. 
• Connect a different source device (TV, Blu-ray player, etc) to see if the buzzing persists. If it does not, the problem may  
   be with the original device. 
• Connect your device to a different input on the Sound Bar.

There is no sound 

coming from the 

Subwoofer.

• If the lights on the Subwoofer are in a slow blink pattern, you will need to pair the Subwoofer  
   with the Sound Bar. See Re-Linking the Subwoofer and Sound Bar on page 14. 
• Move the Subwoofer closer to the Sound Bar. 
• Turn the Subwoofer power switch to ON. 
• To conserve power, the Subwoofer will automatically enter a low power state when not in use.  It may take up to 10     
   seconds for the Subwoofer to link after the Sound Bar is turned on.

How do I listen to  

SRS TruSurround or  

Dolby Digital?

• To activate SRS TSHD, press the Menu button on the remote and use the arrow keys to scroll to the TSHD screen to 
   toggle between on and off. 
• To listen to Dolby Digital, your device must be playing content in Dolby Digital format. Dolby Digital is only  
   available over Digital Coaxial or Digital Optical.

I would like to adjust the  

sound on the Subwoofer 

and Sound Bar.

• Adjust the bass and treble levels using the remote. 
• Try enabling/disabling SRS TruSurround.

18

I want to return my 

Sound Bar to factory 

settings.

• Press and hold the Power, Volume Up, and Volume Down buttons for 10 seconds to return your Sound Bar to its factory 
   default settings.