Yes it's not an issue of doing anything on the circuit board, the unit will need to be re programmed through a dealership, at this point your unit thinks it's just the way it was when it left the factory, you need to be able to tell it that it now has AUX inputs, I had to have it done when I added an audio input so that I could hard wire a Sirius radio into the unit (XM doesn't work where I am) took them about an hour to figure out which codes fitted my config but it works like a charm now