Pioneer Super Tuner III DEH-45DH Problem

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My nefew has a Pioneer Super Tuner III DEH-45DH deck and it has a problem. Has a disk in it, the lights glow on the buttons but nothing on the screen. When ya disconect power for a few min and then hook up the disk spinns and you can hear it reading then it stops and dose nothing. wont ejected disk or go to tuner.
 
ok here is what I tryed

With no diagram for wires, I hooked up the orange fuse wire to + and then hooked up red to +, nothing happened. Hooked up orange and yellow to + and buttons lit up and spit out disk, but nothin on the screen. also found out that the 2 black ground wires dont ground for some reason. hooked a wire from deck to - and it grounds. what to try now or is this enough info to make a call on whats wrong.
 
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