Thread: Cannot update eTrex 20 with a very old firmware

Originally Posted by Butters

If you wish to try this method and need further assistance with the txt commands just ask.

I will be very grateful for any help!

So far my experiments:

1. Backed up all files from internal storage and formatted it by RMPrepUSB.
2. Got pristine new SD, made \Garmin\Updater\1305\ directory, put there boot.bin from 2.20 as LDR.bin and update.txt containing:

rrgn,14,1:/Garmin/14-1.bin
rrgn,14,2:/Garmin/14-2.bin
rrgn,140,1:/Garmin/140-1.bin
rrgn,140,2:/Garmin/140-2.bin
reboot

just to test, can I dump 14th region as a file?

4. After switching on device I got a bootloop :-(, and neither update.txt nor last_id.bin files was created on SD.

Could you give me a clue for the next steps?