Okay, here's the story. BTW i have an alpine 7893. I am at school at leave my headlights on all day, and i cant start my car. I got one of my friends to jump it, but we did it wrong, and it broke the battery. I had it towed to my mechanic, and got it back 3 days after. I opened the hood, and i noticed that the 30 amp fuse that goes with my HU is blown since my radio wont turn on. i bought another of the same excact fuse, put it in, but my radio still wont turn on. What is wrong with it? I also pushed the reset button as the manual suggested, which did nothing. Thanks

 

how did he break the batt?

 

we must have criss-crossed the wires or something

 

does your other electric systems work?

And how's your ECU?

I'm very sorry to hear this.