Had a Montana 650 go dead!
Yes, last week while riding the Ozarks in Arkansas the Screen on the Montana 650 went dead. At first it flashed and lost all maps, after a reboot got the maps back for about 5 mionutes and lost them again, the screen reamined lit. Then tried to reboot it again... nothing, removed the beatery and re-installing back got nothing!
Sent the unit to Garmin, they were great, very good service and support. They are sending a new/rfeurbished unit at no cost. It was crazy, the week before I lost my Quest, and also Garmin had to replace it for $29.