I am trying to put brackets for a wall mount on the back of my Vizio TV, and I am afraid to take the 4 screws out of the back of the TV that are already there, as I really know what those 4 screws are there for, and can't find a picture or diagram anywhere that actually shows where they go. Can anyone help me?
Those are for attaching the bracket to the TV. You can either use them, or longer ones if needed for your specific bracket, as long as they do NOT screw in too far to damage the TV panel. For my Monoprice mount, I used the screws that were included with the TV.