I would just remove the phone and its components since it is non-functional, the phone sends a signal to the radio which causes it to display phone and mute it. a call to Ed Abel at Becker, or sent him a post at
http://mbca.cartama.net/
you will have to sign up no membership required or Eds #
If you need it fixed, please contact me @ 201-773-0976 and I can give you some guidance.