Thread: Nuvi 12xx,13xx,14xx,16xx with "software missing" on first step of flashing process

1) The HWID has changed (use g7towin.exe to determine it), so you would have to use some other folder name, not 0971.
2) Moreover, normal SD card update won't start, as fw_all.bin doesn't start. You need [Only registered and activated users can see links. ].
3) Moreover, why do you want to use the SD card method when you can put the device into pre-boot mode and use updater.exe?
Just rename the RGN file from 09710100yyyy.rgn to xxxx0100yyy.bin, where xxxx is the HWID in decimal notation.
Thus you would flash the original firmware back.
But it's not going to work immediately, as NV memory is from a different model. You would have to run "ergn,41" from update.txt to erase it.

Actually, I don't like the whole idea of taking a chip from a different model. It shouldn't work at all unless the hardware and CPU boot configuration are very similar on both models.