Connect Nintendo 64 to a modern flat-screen TV?

Solution 1:

Coincidentally, I also have a 55" Vizio TV and a Nintendo 64, my favorite console of them all, in my room. For whatever reason, I was able to get my GameCube to work with the TV, but I never could get the N64 to. I just tried it again, and went through every setting I could find on the TV, but still nothing. There's no picture, but I can hear music for not even a second before it goes silent. My Nintendo 64 definitely works, as I was playing Super Smash Bros. on it just a couple of hours ago with a different TV.

All I can tell you is make sure the N64, games, and cords work by testing with another TV and then ensure that the composite cables are connected to the Vizio TV like this:

and the input is set to "Composite". If it still doesn't work, then it's your TV. You can either return it and get another brand, get another TV for your game consoles (like I have), or mod (or pay someone to mod) your N64 to output in HDMI (however, this still isn't guaranteed to fix the problem).

Solution 2:

Another solution would be, if the TV doesnt want to take it, to buy a converter between the AV and HDMI format.

https://www.walmart.com/ip/Fosmon-174-RGB-YPbPr-Component-AV-to-HDMI-Converter-with-R-L-Metal-Casing-Comes-with-AC-Adapter/41475189

If your TV doesnt take it by itself, you propably need something to convert the N64 signal to something readable.