I have a '96 sunfire, when I bought the car it had an after market deck. I was informed it stopped working about a month earlier when I bought the car but they saved the original stock deck. I took out the aftermarket deck and then got the wiring harness out of my uncles sunfire (who's stereo works) to wire the stock deck in. Now the lights will come on (Where the numbers are and the volume), but the screen itself won't come on and it won't play anything, not even static.. What would be wired wrong, we've checked the speaker wires, battery wire, and ground wire and there all connected right, were not sure what to check next.