This is not an uncommon error and is mostly referred back to Nab=vman for repair
Other than sending it to Navman you can...Open up the unit (this voids any and all warranties you may still have and if you go with this option forget about contacting Navman). F20's internal flash is just a hidden micro SD card. If you don't have it already, you'll need to get a cheap micro SD card adapter -- with it you will be able to read the card with any card reader. You could then scan card for errors and look for log files that could provide more information on what went wrong with your unit. Please rate my help++++Thans for using FIXYA
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This is not an uncommon error and is mostly referred back to Nab=vman for repair
Other than sending it to Navman you can...Open up the unit (this voids any and all warranties you may still have and if you go with this option forget about contacting Navman). F20's internal flash is just a hidden micro SD card. If you don't have it already, you'll need to get a cheap micro SD card adapter -- with it you will be able to read the card with any card reader. You could then scan card for errors and look for log files that could provide more information on what went wrong with your unit.
Please rate my help++++Thans for using FIXYA