There are many reasons why a GPS or other electronic devices cease working, and there are just as many suggested solutions.
One of the most reliable options for fixing problems with electronics such as GPS units is updating the firmware on the device.
Firmware is classified as fixed, usually rather small, programs or data structures that internally control various electronic devices. When the product encounters problems within the firmware it often manifests in glitches on regular features and functions.
On some occasions the new firmware loaded into a device can be more troublesome than beneficial. If this is the case users may wish to revert back to the original firmware version. Garmin GPS users can choose the firmware version they prefer using this website, www.gawisp.com.