hi, I bought a 2013 Mazda five minivan sport, And the Person I bought it from said shortly after they replaced the battery which drained for no reason their stereo stopped working and they took it to the dealership and the mechanic said he did not know why it wouldn’t work. The fuses apparently checked out fine and I bought the car thinking I could fix this. I don’t have any display for the radio to get codes from going to put any reset keys in. I’m wondering if there is any power at all going to the stereo.The CD player does not work either or the Bluetooth USB ports and auxiliary port. The cigarette lighter does work. I am wondering where to go from here I would love to hear my car stereo I’ve had this car for over a year and have been using my personal Bluetooth crappy speaker! Please help!