Why did my radio in my car stop working just out of the blue?

I have a 2012 Ford fiesta. And a couple years ago I was riding down the road listening to music and then all of a sudden this really loud static noise started to come out of the speakers and it kinda sounded like it was mainly coming from the passenger speakers but after the noise went away my radio has not worked. Other than 1 time when I was driving down the road and just randomly I just happened to push the power button and the radio played just like normal but as soon as I turned the car off it didn't work after that. I read in the manual about the meaning of a couple lights that appeared on my radio and the manual says that the radio just needs to be updated and that I was able to do it myself with the radio itself. But the only buttons that work are the buttons that my radio is not equipped with like Sirius radio and cd player. I've called multiple Ford dealerships and not one person that I've asked about this knew what I was talking about. So does anyone know what caused my radio to quit working and how to fix it?

Could be lots of things. You're better off with a car stereo/radio specialist than a general mechanic at the dealers.