Hi FireFox58,
I have a nuvi 55 HWID 1697 with a faulty USB port but still powering the unit so I'm unable to patch the FW in pre-boot mode as I have done successfully before.
I'm interested in how you created the files you put together for Rostman ,I looked at the format and have used the RGN_Tool to get the .bin files but I don't know how to make the update.txt file.If you could help me learn that would be good or even if you could create an Archive with the FW Version Adjusted & Patched.GDC file I have used and know is working?
This is what I have created but obviously not tried.
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Thanks