Garmin C330 white screen
Have you tried a Master Reset? If not, it may help, but it WILL ERASE ALL OF YOUR FAVORITES, and may remove anything you have updated. To do a Master Reset, turn the unit off. Press the On button and the bottom right of the screen at the same time. Release the On button, but keep pressing the screen until the unit asks if you are sure you want to reset. Press yes. This may help.
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