I have a Vizio VA19L HDTV10T, and I want to reset all my previous settings. When I navigate to that setting and I press the Volume Up button to select it, it asks me if I'm sure. The menu button just goes back to the menu, and so does the Input button. The Channel Up/Down buttons do nothing, and the volume buttons just hover over the choices without selecting either of them. What do I do to accept and reset my settings?