I bought my Vizio TV 2 years ago and I just got my Super Nintendo from my parents' house. I tried hooking it up to both of the TVs I have and neither of them even recognized that I had it hooked up. The only 2 cords that my SNES has ever had are the power cord and the RF switch, which has a coaxial output. Is there any way I can get it to work?
It's going to depend on what inputs the TV has. Most TVs still have coaxial input (ie, the kind that screws on). The TV must be on the right input and tuned to the right channel. Typically this is "TV" or "Coax" input, and channel 3. It may vary depending on your TV. Sometimes pushing the "Channel Up" or "Channel Down" buttons on the remote will switch it to this input.
If that's not working, you can pick up a composite cable, which may help if it has a composite input. Most TVs still do - it's an input with one "yellow" jack for video, and a "red/white" pair for audio. (pic on this page, go down to "composite") If you're wanting to get it going today, check with GameStop or wherever used games are sold in your area. New game stores may also stock it, but call first. I believe that the GameCube, the Nintendo 64, and the Super Nintendo all use the same cables, so you might have better luck if you ask for a more modern revision of the hardware.