Maestro de Turismo
Join Date: Apr 2005
Location: Madrid, , Spain
Chuck is right, don't listen to him. :-) The 2820 doesn't have a hard drive, it uses flash memory which vibrations shouldn't affect.
I have a 2820 (well, actually it's in the shop right now). Mine did something similar and also lost (erased, extiguished, made disappear...) the pre-programmed route I was riding and basically reset all of the settings back to new during a ride.
It was a bitch because I was on some major backroads in the mountains (some of the roads did not appear on the mapping unit - unfortunately Spain cartography is still not 100% at Garmin) and without a proper paper map. It took me an additional 100 km. before being able to find my way home.
I don't know what the problem is, but I have read others have had some problems with the 2820. Mine went into the shop because some days after the aforementioned event my bluetooth just quit working. It would not activate or de-activate.
I should get the unit back this week.