Since the operating system and navigation software are preloaded into the internal flash memory of the GPS, the freezing may either be software or hardware failure.
First, press the "Reset" button or push the stylus into the "Reset" hole, to see if the navigation software can load successfully.
[Reference : Nextar]
If the program still does not load, then the software may be corrupted. Also, if the internal memory fails to read or write and the software cannot load properly, it may be caused by hardware failure.
Positive Feedback and BONUS are always appreciated.
Where can I find the reset on my GPS my model is the one with the back up camera and the only hole that I see is on the bottom of the unit and it is about the diameter of a paperclip nothing with reset labeled.