viele werden sagen, das lohnt sich nicht...
Warum? Sind robuste, handliche Dinger.
Meiner tut seit Jahren brav seinen Dienst...
Schon mal master-reset versucht?
https://support.garmin.com/support/searchSupport/case.faces?caseId={a1f85d30-a65f-11e4-4df3-000000000000}#200205
To perform a master reset on a LIVE 1695, 2300 series, nuvi 200, 205, 405, 500, 600, 700, 705, 1100, 1200, 1300, 1400, 1690 series, zumo 220, 450, 550, 660, and 665:
- Start with the device OFF and unplugged from power
- Touch and hold the lower right corner of the screen with an index finger or the eraser end of a pencil
- Continue touching and holding the lower right hand corner of the screen then power the device ON
- Release the power button when the device powers ON
- You will see a new message: "Do you really want to erase all user data?"
- Remove your finger from the touch screen when this message displays
- Touch Yes
- If text language is not in English, this is the button on the right
The device will now reset. Follow the on-screen prompts and then place your device in an area with a clear view of the sky until it acquires satellites.
1Although the master reset will erase all saved favorites, any loaded custom points of interest will remain intact on the device.