How to Reset a Vizio HD TV
You might consider resetting your Vizio HD television to its factory defaults if you've adjusted the sound and picture too many times and want to start over. Or if you are experiencing sound or picture problems with your Vizio TV, resetting your TV may resolve your issues. With your remote control, you can access your Vizio's Settings menu and reset your TV.
Press the "Menu" key on the remote control for your Vizio television.
Press the right arrow button to select the Setup menu.
Press the down arrow button to select "Reset All Setting."
Press the right arrow button, and your Vizio TV will begin resetting itself.