Newbie questions, for 255W
1. How do I turn off (really turn off) the unit?
2. How do I hard reset it? But OSM map uses different map engine?
BTW, I found when charging, you have to wait (about 30 secs) after connecting USB cable, it will reboot to navigation and then you can turn off unit via power switch. Now I don't worry about screen "burn out."

P.S. Maybe Garmin considered entering pre-boot "unsafe" but still need to provide a way for their tech people to do it?