i got a problem with my n1.... my multi-cd player is not working with my N1 it has worked before and then all of the sudden it stopped... i sent it in to get repaired and pioneer said it was fixed. i tried everything on the set-up screans to try and select the correct imput as well... i got nothing can any one give me a hand?

Check power connections first. If you have power at the changer, then next possibility is a damaged ipbus cable.