Check your fuses. (fuse box) If fuses are good, check power and wiring connections, if that's all good, take to a repair shop, you may have fried it.
its probably broken or not plugged in
when it doesnt work
Might be that your charger is messed up or you may have plugged it wrong or the charger doesnt work
The stereo is wired wrong. In this case it sounds like the ground wire of the stereo is hooked to the dimmer circuit. The ground wire of the stereo should be connected to the vehicle chassis.
make sure the speakers werent stolen first off then try new wires from the stereo to a speaker that you are sure works. if that speaker doesnt work take your stereo back
the ignition switch is bad
The fan motor has failed and will need replaced.
burnt light bulbs
The electric energy in a portable stereo is in the batteries. The batteries are what supplies the power to the stereo and in turn makes it work and produce the sound.
it doesn't work!!
You should get the battery checked first.
it depends what is wrong with it....start by figuring that out. It doesnt work. Thats whats wrong with it.