Thread: Nüvi 3790

Hello Garman, I'm glad to know that someone has been interested in this recovery.

Originally Posted by Garman_Nuvi

You seem to have some strange files shown in your pictures Pro coding 070496200 for one.

I don't understand what you mean by Pro file. These files have been loaded in the map update. Why are they strange?

Originally Posted by Garman_Nuvi

The surprise to me is the your original device 1W8000220 without LM

I don't know where you got this serial number from, my Nüvi model, it has never been this one. Could it be that there is something corrupted in the serial number and that is why my nüvi does not work well as a nüvi 3790?

I don't know if I'm right or not, but I still think that the LM map update was offered to me after I downloaded the unlocked map files from the internet and copied them to the nüvi. Before, whenever I connected to Garmin Express, if I wanted to update the map, I had to pay for the update, I think it cost €99.

Originally Posted by Garman_Nuvi

[Only registered and activated users can see links. ] has been removed from updates

Thank you for the information!

Originally Posted by Garman_Nuvi

These file structures might help you.
[Only registered and activated users can see links. ]
[Only registered and activated users can see links. ]

Thank you for your help, I now it. I think, that the PC files, aren't necessary, because if there are a copy all the folder and files of the nüvi, is sufficient, Relay?

Greetings

Originally Posted by Choco

Hello Garman, I'm glad to know that someone has been interested in this recovery.

I don't understand what you mean by Pro file. These files have been loaded in the map update. Why are they strange?

Most probably left overs of the 2012 NT preprogrammed maps you had causing a conflict. The G2S folder is just taking up space now. Compare your device files & folders with the one I shared [Only registered and activated users can see links. ] now contains .system folder
[Only registered and activated users can see links. ]
Check your PM.

Originally Posted by Garman_Nuvi

Most probably left overs of the 2012 NT preprogrammed maps you had causing a conflict. The G2S folder is just taking up space now. Compare your device files & folders with the one I shared...
Check your PM.

Hello Garman, now I understand you. You think there is a conflict between the 3D map files.
I explain to you:

Originally Posted by Choco

When I installed this map on the nüvi 37xx, I connected the nüvi to Garmin Express (via USB pretending it was the nüvi 37xx) and Garmin Express updated the maps. Today, and installed those maps and the files that were updated (a JVC file and some other files) on the nüvi 34xx, they are the maps that I show you in the following photo. Voice commands do not work with these maps either, I have carried out the test with all the ASR files that I had from the web download, and I have also tested it without these, only leaving the original ASR files.
Tomorrow I will try to test if the crossover view (JVC) works well.

Spoiler: [url=https://postimages.org/

[/url]]

When the nüvi became a 37xx, I copied some files I found on a website and these corresponded to City Navigator 2025.10 Western Europe. Subsequently, I connected the nüvi to Garmin Express and it was from this moment that Garmin Express offered me a complete City Navigator Europe update. So, I updated the map but I didn't do it with the nüvi connected (I was afraid it would get messed up again), but with a USB simulating it as if it were the nüvi. When the installation of City Navigator Europe 2025.10 was finished, I copied all the files to the nüvi and the maps in the photo above appeared on (my maps).


Once the transformation of the nüvi to 34xx was completed and after uninstalling, deleting, deleting any Garmin folder or file from Windows 10, including deleting the Windows Registry, I deleted the GarminDevice.xml file from the nüvi 34xx, and installed the Garmin Express, I connected the nüvi 34xx and that was when Garmin Express offered me the 5 updates that I showed in post no. #33. [Only registered and activated users can see links. ]
When I updated the map, as Neil told me (with the nüvi connected) that was when all the system folders, voice, JVC, SID, and the maps that were installed were installed, I think they are correct. These are my maps shown now.

Spoiler: [url=https://postimg.cc/75jz7v5L

[/url]]

Now, in the 3D map, the Pro coding is no longer shown. It is possible that in the map update like nüvi 37xx, a somewhat corrupt installation was made, but I get the feeling that now, like nüvi 34xx, the map installation is fine.

This week, I will review my folders and compare them with those in the file that you have provided me, my idea is to delete the files that the system used when it was nüvi 37xx and leave only the ones it needs like nüvi 34xx, since, as you say, they are files that only take up space and can even generate some type of conflict. I will keep you informed.

Originally Posted by Garman_Nuvi

[Only registered and activated users can see links. ] now contains .system folder

By the way, I still don't see the .system folder.


Thanks for your help Garman, a hug.

@Choco
As it's been shown that your device's region 41 doesn't delete or erase successfully (and therefore likely cannot be written to either) it's of more concern that there's other problematic data rather than some outdated data related to earlier maps.

Does GarminDevice.xml properly update after each boot-cycle? Try moving it manually to a safe location on your PC and then boot the device to check it's properly re-created and compare the two files if it is. If it's not recreated properly on boot then the device certainly can't even read data in region 41.

About Audible, there are only a couple of short sample books and a Welcome audio in that folder, and you'd need to add books in .AAX file format to listen to more. Nobody ever seemed to use it much to listen to audio books on Garmin devices anyway in my experience but if you want the original files here's the zipped folder: [Only registered and activated users can see links. ]

BTW, the .SUM extension is indicative of checksum files and they're not really needed even for current files so either can be deleted safely or just left there - even for old unused removed files - they won't harm anything.

Originally Posted by Neil

@Choco
As it's been shown that your device's region 41 doesn't delete or erase successfully (and therefore likely cannot be written to either) it's of more concern that there's other problematic data rather than some outdated data related to earlier maps.

That's how effective Neil is. Notice, when I perform a wipe of non-volatile memory:
The wallpaper disappears.
The configured vehicle also returns to factory settings.
The option not to manipulate the User Interface also returns to factory settings.
But the saved places, even though I have deleted them from the (saved places) option, when I do a wipe of the non-volatile memory, they reappear. THEY NEVER BE DELETED.

In principle, I think that the traffic trend that appears in My Maps does not generate any problems in operation, just as you and Garman say.

Originally Posted by Neil

Does GarminDevice.xml properly update after each boot-cycle? Try moving it manually to a safe location on your PC and then boot the device to check it's properly re-created and compare the two files if it is. If it's not recreated properly on boot then the device certainly can't even read data in region 41.

Neil, I did what you told me and it works fine. I think that by deleting the GarminDevice.xml file and restarting it, when I connected to GE, that's when it gave me a complete update of everything I needed. I explained it in post 33, remember?
[Only registered and activated users can see links. ]

Anyway, I deleted it again and indeed as soon as I reboot, a new GarminDevice.xml file is generated. Look at the image, the files that start with MM are those from previous times.

Spoiler: [url=https://postimg.cc/BjYqhL8J

[/url]]

I have compared the file it generates and the one I previously renamed starting with MM and they are identical.

Spoiler: [url=https://postimg.cc/WDSTDDvB

[/url]

[Only registered and activated users can see links. ]]

Originally Posted by Neil

About Audible, there are only a couple of short sample books and a Welcome audio in that folder, and you'd need to add books in .AAX file format to listen to more. Nobody ever seemed to use it much to listen to audio books on Garmin devices anyway in my experience but if you want the original files here's the zipped folder: [Only registered and activated users can see links. ]

Thanks Neil for the file, now I have been able to check how the Audiobook app works.

Spoiler: [url=https://postimages.org/

[/url]

[Only registered and activated users can see links. ]

[Only registered and activated users can see links. ]]

Originally Posted by Neil

BTW, the .SUM extension is indicative of checksum files and they're not really needed even for current files so either can be deleted safely or just left there - even for old unused removed files - they won't harm anything.

Thanks for your explanation, I'm more calmer.

One question: What video files can I watch in the video player? I have uploaded a .mp4 video file and the video viewer app detects it, but tells me that it cannot be played.

A hug

Originally Posted by Choco

............
Una pregunta: Qué archivos de vídeo puedo ver en el reproductor de vídeo? He cargado un archivo de vídeo .mp4 y la app de visor de vídeos lo detecta, pero me indica que no lo puedo reproducir.

Un abrazo

Please post in English only. I guess you just forgot to run the above final paragraph thru a translator:
"One question: What video files can I watch in the video player? I have uploaded a .mp4 video file and the video viewer app detects it, but tells me that it cannot play it. A hug"

Yes, it's as you noted in the post following. (Best not to do that either, use the edit function to add info to the preceding post if it hasn't already been answered). The video player can use files other than MP4 such as WMV. Additionally, i recall AVI is also supported. Certainly MP4 files must be H.264 codec and all types of files must be 720*480 resolution or they won't play - or perhaps that's only a maximum resolution and they can be less, just not greater pixel size.

As for region 41 clearing, it's plain to me from your consistent explanation of retained data and now confirming the recreation of a new GarminDevice.xml that:
(i) it's not really being cleared of "delete-able" data (and neither can the entire region be erased), however;
(ii) the device can still READ it or the XML would not be rewritten properly on re-boot.

As i've said before, if there is 'poisoned' data in 41 from your previous firmware manipulations, and there most likely WILL be, should that be accessed by the device in the future it might at worst 'kill' it and it'll never power on again, or it might just cause an annoying glitch where it'll freeze or re-boot spontaneously or it'll even soft-brick itself. To check whether it's also being successfully WRITTEN TO you'd need to change something obvious and re-boot to then re-compare the old and new XMLs.

Here's 34xx help files, unzip and add the Help folder into the root of the internal memory: [Only registered and activated users can see links. ]

I wasn't clear enough about what to 'change' i think. I didn't mean you should make a change to the XML file itself, that won't work. But nevermind, i was only musing. It most likely doesn't register any files changes and even if it does there's still no way to clear potentially troublesome data from 41 anyway.

To enable the Language Guide see this thread: [Only registered and activated users can see links. ].