Hello,
I recently upgraded from AVIC-U310BT to AVIC-X910bt. I didn't replace the power wiring with the old one I had, because when I checked, everything looks the same. I plugged in everything. The navigation,ipod, radio work great. but when I go to the phone every icon is faded out and I won't be able to choose the setting or anything. I have the same problem with system setting icon. What could be the problem?