Created a AVIC411 account just to say THANKS!!!! I tested everything before I ziptied all my cables and made it look neat and the unit worked. Right after I cleaned it all up and was about the slide the head unit in, no power Tore apart everything, tested voltages, continuity, even used a power supply to power the unit. Nothing... then read this and voila, it turns on again. 5 hours wasted so far, now to clean it all up again. At least I was able to save wasting another day. Thanks so much. I really mean it.