Sorry to hear about your demon Garmin. I have odd problems with mine, my husband's - never! I say that my Garmin hates me. This summer I got the auto shut off problem too, on my tour from Wyoming through South Dakota. Then I noticed that it never shut off while my bike was at rest (eating yet another another truckstop meal). My mounting plate had a teensy bit of play in it. We replaced the plate, rock solid, but it will still shut itself off if I am on some really really washboard road. Next time I'm riding on super rough stuff, I may secure the Garmin in my pocket to save my frustration. tokie