on the sony cdx-m730 it claims to have an auxillary input. I hooked up the rcas to the aux marked spots and connected it to my mp3 player, it didn't work. hooked to laptop then dvd player. doesnt work. I went to best buy and the guy gave me this bullshit abou how you have to have a input device controller and that i should just buy the cd changer and hook stuff up to that. anyone that can help me please do.

 

i have installed tv's in cars with sony headunits and just plugged into the aux input and they all worked just fine. did you change the source on the deck?

 

Probably have to turn the AUX on through a menu.