Thread: Thailand Streetmap Eng NT+THAI V11.00+JCV+ DEM+ Thailand 3D Building

Originally Posted by Milton

Thanks Khun Aekhong. May I understand correct that if I use original boot.bin this will help to prevent my Nuvi turn into a brick? In my case, what should I do for instruction no. 4 ("4. Downgrade your FW Nuvi 1490 US to 3.00 US by 1490 300US.rgn with Updater. or nuvi13xxand14xxseries_regionfileonly__300.gcd.")?

If you need to go back to US3.00 firmware., you can...

-Use RGN_Tool to open "original US 14xx swv3.00"
-save to a .rgn file (without modified)
-Use updater.exe to flash nuvi

That's it. !!

And yes., Your nuvi will be fine with your original boot.bin
It may keep rebooting if .rgn file is wrong but it's easy to recover just use your original gupdate.gcd file using RGN_Tool to save to a .rgn to recover your unit.