Stock stereo system questions
 

Alright my head unit lost all power the other day when I came out of the gas station. Checked the fuses, thats all good. The door chimes when you leave the keys in the ignition also stopped working. Now does this sound like it would be more amp related, or the head unit itself? Im not exactly sure which supplies power to the other? I dont feel like replacing the stereo at this time so if anyone can help me fix this it would be great!