Street Pilot c340 froze up
I had the same problem, the face plates comes off by sticking your finger nail under the little notch under the garmin symbol and pich off the thin face plate, there is a reset button under the face plate in the middle of the right hand side of the edge of the face plate( visible when the face plate is dislodged. I held the button in for a second or two, you can feel the button recess as you push down on it) and the unit resets without disturbing the existing programed route
car starts fine, security light us bkinking when i remove faceplate but when i put back in place it goes to standby and then shuts off
this is on a 2008 Hyundai Tiburon.
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