Vizio E420VT - Manual (Page 7)

If you have an external antenna or a cable connection that
extends from a wall outlet, connect it to the TV with an
RF/Coaxial cable and the included RF Adapter.
4
Turn the TV on by pressing the Power/Standby button on the
remote or on the side of the TV.
The Setup App is displayed.
Initial Setup
Allow the VIZIO setup Wizard to
help you tune your channels.
Welcome
Next Exit EXIT
3