Your AVR should have a composite video output (just a single RCA output; usually yellow) and it should pass the OSD through that, too. Does your Vizio have a composite video input?
It is possible, too, that your AVR passes the OSD via its component video outputs (if so equipped, they're 3 video outputs colored blue, green, and red) although many don't. Does your Vizio have component video inputs.
How have you adjusted all your other settings with no OSD?
(OSD = on screen display)
"All men are frauds. The only difference between them is that some admit it. I myself deny it."