Alright, I'm having the same problem. I called Pioneer three times (because two of the guys had NO clue) and they stated that the N4 will NOT play Iphones, Itouch and Ipod classic. So what I did was bought a older model Ipod (5th gen video Ipod) and now it works fine, video and audio. So depending on your Ipod, that could be your problem. Error-A0 is apparently some sort of error not sending enough power to the Ipod using the IBD-200 cord.