Tja, gute Frage. Leider habe ich keine passenden Tipps mehr.
Hast Du die uSD-Card aus dem 62er heraus genommen ? Eine defekte Speicherkarte könnte das updater-Programm stören.
Funktioniert der Garmin USB-Treiber noch ?
Hab soeben noch mal gegoogelt und fand das hier:
Follow these steps:
1. Remove the batteries from your GPSMAP 62 or 78
2. Download the recovery file, save it onto your PC and unzip the file into a directory such as C:\Recovery
3. From Explorer, navigate to C:\Recovery and drag and drop the rgn file onto Updater.exe. The updater program should start.
4. Set "Connection Settings" to be "USB Device".
5. Hold down the "Up" arrow button on the GPSMAP and connect the GPS via USB cable to your computer. (Note: I've seen some Garmin instructions that indicated that you should hold down the "Power" button but this has not worked for me)
6. Once the device name is visible in the Updater window after "USB Device", click on "OK".
7. The program should start the update and you can release the "Up" button.
8. Leave the GPS plugged in until you receive a confirmation of a successful update and click "OK".
9. Unplug the GPS, reinstall the batteries and power on your GPS. Under Setup>About verify the device is running version 2.40
10. After this update run Webupdater to make sure you have the latest software.
If you would like to use this procedure to upgrade to a different version from the one provided in the recovery file above go to the Versions page and download the gcd file for the version you would like use. Download and run TurboCCC's RGN_Tool to convert the gcd file to a rgn file and use that rgn file instead of the one included in the recovery file. This tool has been used
successfully with the default settings but please see TurboCCC's wiki for the latest details on how to use this tool.
Wesentlicher Unterschied ist die verwendung der Wipptase "Pfeil nach oben" statt "Power-Taste", während des Verbindungsaufbaus.
Viel Erfolg !
Gruß
Wolfgang