I was installing my deck in my 93' p-finder and I know I hooked all the wires up properly but my deck will not turn on. The factory stereo has an amp which may have something to do with the problem but I highly doubt it. I tested the ignition wire and the constant power with a test light and everything has power my ground is also good I dont know any other problems that could cause this. Is my deck fried???? should I have it checked out????