My brother had the car for a while and I know that he had left the lights on and was forced to get a new battery. I'm not sure if that's what caused the problem but I got it back today and I decided to try and fix it. After searching around on the internet I found alot of places saying unplug the battery for like 5 minutes so I did and it's no difference. What do I do? {By the way I put a CD in and the screen will say Track 01, then you hear it click twice and it'll say Check Cd}