Is there any part of the radio that is connected to the navigation unti.
 

As noted in my earlier post I did the DIY heat repair. When the repair was finished I reinstalled the everything but my navigation went sketchy. I can press the open screen button but sometimes it does not come on. I find that if I wiggle the screen back and forth for a few seconds then the nav will cut on. I am wondering what would cause that since as far as I know, the repair I did had nothing to do with the nav or does it? If any body can point me in the right direction I would appreciate it. I plan to take out the radio and take a short look at the nav, but I have no idea what I am looking for. Once again any help would be appreciated it.