Thread: Nüvi 3790

Depends on what you did, as to what should be done to recover that function.

If, as part of recovery using Cure firmware, you subsequently formatted the file system and it then lost Voice Command it might just be lacking some essential files like SRD, ASR & SRX.

If it was a spontaneous loss of function regardless that all files were left in-place then it likely has a severe corruption in the nonvol region due to your updating attempts. My guess is it was that - due to you seeing "37xx" instead of "3790".

So you need to tell us exactly how it happened, i.e. what you did in detail before it needed to be cured, then a course of action can be undertaken. Regardless of the cause, if you haven't already done so please clear the non-volatile memory to see if that changes anything with the loss of model number: [Only registered and activated users can see links. ]

Hello Neil, thank you very much for your response and help.
I tell you:
- I installed an update for my nüvi 3790 from Garmin Express and once it finished successfully, I restarted the nüvi and it did not start, it stayed in a loop, on the Garmin logo screen.

- I read through the forum and applied the Cure, in cure mode with the firmware (37xx_GDCFile_V5.10.gdc). I got the nüvi to connect to the PC in mass storage mode. I then applied the Cure in original mode with the firmware (37xx_GDCFile_V5.10.gdc) and the nüvi booted perfectly.

- From here I began to realize all the things that were not working well or that were no longer available. nüvi 37xx appeared on the home screen instead of nüvi 3790, in utilities\settings\about\ 37xx also appeared and voice commands were no longer in the utilities menu. I also realized that the DEM mapping was not working well, the shadows did not appear. At this point I made a copy of the entire nüvi hard drive on my PC (folders, hidden folders, files...), but I did not make or know how to make the NV backup.

- With the nüvi 37xx running, I started trying cartography from different free sources, since the cartography I had was from 2011, but I didn't find anything that I liked, I finally found the unlocked Garmin City Navigator NTU 2025.10 cartography and the files extras, so I copied it and ran around with it for a while.

- I tried to modify the Sg 34xx firmware along with the original with the RG-tool, crossing regions, creating .rgn files and trying to install them in preboot mode, but the only thing I managed to do was leave the nüvi in a loop.

- I have learned how to copy and write region 41 through the commands copied to an empty sd card.

- Finally, yesterday, I managed, with Catymag's instructions, to transform the nüvi 37xx to 34xx, apply the activation of the extras and load the Garmin logo. During this process it was the only time I deleted non vol memory. The nüvi 34xx works very well, the DEM mapping works well, the 3D and the roadside assistance I don't know, I haven't had the chance to try them yet and I love the user interface. The voice command is not available for any language, (mine is Spanish) I have tried it with all languages and the same message appears (The voice command application is not available for this language). In reference to the GPS of the 34xx, I can tell you that it connects just as fast as with the 37xx, but it is true that the accuracy in meters is not as good, and I don't know why the car jumps, it seems slowed down.


If I could get my nüvi37xx back to 3790 with all its features working it would be fantastic, since for me the nüvi has a lot of sentimental value.
I look forward to your help Neil. Thank you very much for your help.