evildky wrote:is there power at the power wire in the back of the stereo? if you got power to the stereo but it doesn't come on, it's a bad stereo
Check this above first.
Pull the head unit out and find the 1) constant hot and 2) ignition hot wires... They should have 12v + when the key is on. If these wires do indeed have power, then the radio it what is broken...
Unless you also have amps. If the head unit comes on but you can't get any sound, then you have to check the wires leading to the amps just like above - check to make sure the wires leading to the amp(s) are powered... If so, you may have a broken amp.