So, yesterday I had to go out and get something and my car was totally fine. Then a couple of hours later, I went out again then the inside lights won't come on, the radio won't turn on, the door-open light is shown, the lock & unlock button on my keys won't work. ( I even tried my spare keys to see if it will won't and it won't. ) It is used and it's a 2008. I took it to a place to see what's wrong with it and they said all the fuses aren't blown or anything and told me to take it back to were I bought the car. Does anyone know what might be wrong with my car?