Thread: Modding 3760T

Yes, change fw_all hwid to the same as boot.bin.
You can save to
.GCD file or
.RGN file

For .gcd
You can put in 2 places
- .system\gupdate.gcd or
- sd card\garmin\gupdate.gcd
I like to put in sd card

For .rgn
You need updater.exe to flash a .rgn file with pre-boot mode

You should know how to flash with .rgn via pre-boot mode.
Because if you get the rebooting loop problem , then you have only pre-boot mode to restore your Nuvi.

How to go to pre-boot mode
-go to inventory page
-press Exit
-Nuvi will re-open
-Press your finger above "G" of "Garmin" logo
-You will see small word "system" above Garmin logo , that's mean you are in pre-boot mode
-Now you can connect to USB (run updater.exe on computer and drag your .rgn file drop on updater.exe first)
-Updater.exe will detect Nuvi, then press OK to flash a .rgn file
-still press your finger till it finish.


Before flashing
- Do hard reset
- Don't forget to delete .gcd file within .system
- Rename these folders :: Voice , Text , Keyboards to other name

After flashing
- Do hard reset again
- After flashing and your Nuvi is fine , then you can rename these folders back to original name.


what will get for 3750 to be CHN 3790 v 2.20 (All of asian firmware give you POIS icon on map viewing, but CHN give more)
- Waypoints symbol on view map page
- 3D building
- Terrain view
- Mp3 player
- Calendar , Contact

About Text, Font
- It depend on which one you will select to use.

About Voice Command , still works.

You can go to original firmware just use US gupdate.gcd
If not, you have to use original US gupdate.gcd to save to .rgn file (without modified) to flash nuvi back to US unit.

Good luck

PS :: I can't make sure it will work (to go to CHN 2.20., or 2.30) because the fact is
1). my older 3790T can go to Sg/My 2.20., 2.30 // CHN 2.20 but can't go to Sg/My2.50 and CHN 2.30 and Taiwan 2.10 ., it keeps rebooting loop.

If your 3760 get rebooting., maybe you need to go back US.

Firmware Chinese

Code:

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Firmware US

Code:

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Firmware Singapore/Malaysia

Code:

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Ok, sounds good. Only one thing confuse me. Is there any advantage about .rgn way. Is it not possible to delete the gupdate.gcd under .System and replace it with the new one over usb in one step? What about the SDCard-Way? Will it automatically overwrite the one under .System? When something goes wrong. I would copy the orignal gupdate to .System or by the SDCard-Way.
If I recall your words in the right way it could be possible the device stuck in a loop and there isn't any chance to access the SDCard or the device over usb. The instructions about flashing (hard reset, rename of the folders) only affect me when I use the .rgn way?
I bought a european version is the us/euro version the same?

The updater.exe is the tools that garmin provides with rgn files for different devices? I found a GPS15H_L_440.exe. That I believe is the updater and any special rgn. So if I like to update via updater I need a folder with the updater.exe and my own rgn file.