Hi my Garmin Zumo 550 will not turn off and the screen is locked and will not move when my bike is moving.
Screen locked at about 2 and a half miles from home location.
I know this is an old question but just thought I would share an answer. If you hold down the + button (upper left) and the power button (lower right) it will power the unit off when it freezes. Much easier than removing the battery.
I have the same problem. Seems to happen when I get a photobox warning in a tunnel an after that loose satelite connection in the tunnel. This has happened two times at the same place, The only solution I`ve found so far is to take out the battery and start again. Hopfully there will come a software update for this soon!
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exactly the same - about three mile from home this eveing everything locked up.
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