The Super Nintendo Entertainment System was launched by Nintendo over 20 years ago, long before the advent of flat screen LCD, LED and plasma televisions. However, Nintendo did future-proof the system to some degree by using standard cables to connect the system. Each SNES came equipped with a stereo AV cable that has a proprietary connector on one end and standard red, yellow and white connectors on the other end. Vizio flat screen televisions are equipped with corresponding input jacks.
Plug the rectangular gray end of the cable into the back of the SNES. This is the proprietary end of the cable and its official name is the "Multi-out" end.
Plug the red, yellow and white end of the cable into the corresponding color-coded composite jacks on either the back or side of your Vizio television, depending on the model. The yellow cable carries the video and the red and white carry the left and right audio channels.
Insert a Game Pak and turn the SNES on. A red light should appear on the front of the console.
Switch the television to the corresponding input with either the buttons on the television or with the remote. This button is usually labeled "Input;" keep pressing it until you see the SNES game on the screen.
Be sure to fully insert the Game Pak before turning the console on or the video may show improperly or not at all.