A few months ago I bought a Nuvi 50LM and last week when I went to use it again the screen froze on GARMIN. It would not go away. I went to the operating manual and found nothing to fix this problem. I was sure that Heat had destroyed its internal workings since it stays on the windshield 24-7. Fortunately I went to the Garmin.com website and found support then looked for solution to problem. Nada.
I then went to the chat screen and got help. Solution is found in the FAQs for the item. It is a lengthy process that I won't go into here but you download 2 files and then follow the directions exactly and when finished the unit is functional with a new operating system that corrects the problem.
The new version is 1.70.
Sounds like fun. Thanks for the heads up :)