Btw as I trust Oregon 6xx wiki and I've read this:
babj615 about 17 hours ago
I see others have already reported it, and now I also am suffering from a bricked Oregon 650t after updating to v3.70.
I decided to stop testing and went back to previous firmware
Spoiler: wiki post link
http://garminoregon6xx.wikispaces.com/share/view/65927778



NOTE: I moved posts regarding new Oregon firmware from [Only registered and activated users can see links. ] here.