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Lets try to get the device working with a factory reset.. heres how.
Power off device2. Hold the ‘Back’ and ‘Ok’ buttons, and press the power button until you see Garmin on the screen3. Continue holding Back and Ok for 10 seconds4. After 10 seconds, release the Ok button5. 5 seconds after releasing the OK button, release the Back button
If done correctly, the initial setup screen will appear shortly.
If that gets it working again, Id suggest connecting the S20 to your computer with garmin express, and allow it to update.
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