From another post:
I'd try a master reset. 3 ways to do it;
1- disconnect car battery for a few seconds
2- find and remove fuse for the nav then put it back in
3- plug in a usb keyboard to the upper usb port and do a control alt delete (not sure if this will reset the nav)
I'd try a master reset. 3 ways to do it;
1- disconnect car battery for a few seconds
2- find and remove fuse for the nav then put it back in
3- plug in a usb keyboard to the upper usb port and do a control alt delete (not sure if this will reset the nav)