Quote:
From my point of view I have now everything together
The update.txt has this content :
....................
and is located in Garmin/updater/1772/update.txt
There is also the Ldr.bin .
Could this work, can I have made a mistake ?
Certainly the txt commands are correct to delete any gupdate.gcd file from .System, dump the nonvol memory to the card and rewrite data to the 3 fw regions from the card. So yes it will work provided you're using the right Ldr.bin in the HWID folder made from the correct 1772's boot.bin extracted from the appropriate firmware. However, again, what's the point? Even if the GCD in .System was corrupt, it's not being initiated anyway. If it was corrupt and initiated the device would be soft-bricked and stuck on the logo splash screen.