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Problem with Garmin Nuvi 3790T

Former Member over 13 years ago

Hi guys,
I would need some advice concerning a recent problem with my device.

I have a Garmin model Nuvi 3790t and a subscription of map lifetime update for Europe.

I was running the Nuvi 3790 with firmware version 4.5 and european map version 2012.20 and everything was fine.

Last weekend I have updated the firmware version to version 4.7 and I have also updated my european map version to version 2012.30 with success, as I could confirm on mygarmin.com web page.

But 2 days ago, when I've tried to use the GPS on the road, after a few minutes the graphics became blurry and I could not use the device again.
I have turned off the device, restarted...and again, after a few minutes I've had the same problem. The same for a third time.
Also, when I've tried to set a new destination (Where to - address), appeared the message: No map data available. I could only choose the destinations already inserted on my favourites.

When I was back at home I've decided to do a master reset on user data of the instrument to see if this problem could be solved.
Afterwards, I've powered up the device again and waited a few minutes for it to acquire the satellites.

Now, when I turn on the GPS and see my location on the maps, the roads are missing and only appears the landscape with railway tracks.
If I try to choose a destination appears: No map data available.
If I go to Tools-Settings-My maps, the device recognizes 2 maps: 1 - Cneu Dem Europe Dem, 2- CN Europe NTV 2012.30.
Shouldn't appear a 3rd one with the remaining data?

Please let me know what do you think and I would really appreciate if someone could help me to solve this problem as soon as possible.
Should I try to install again the new map? (is it possible to reinstall over the previous?)

Thank you very much for your attention

0 POPEJ. over 13 years ago

Firmwares 4.50, 4.60 and 4.70 are buggy, the former crashes when using myTrends, later still has problems with disappearing LA/next turn icon. Better stay with 4.30, which has less obtrusive bugs.

You probably has some problems with nuvi internal disk. Your 3-rd map should be CN EU 3D in file \.System\gmap3d.img.

0 Former Member over 13 years ago

Thanks Popej.

I had firmware 4.5 and it was still going fine.
I will check if the file gmap3d.img is present.
If not or if it is present but not recognized by the Nuvi, I will try anyway to reinstall the new map and see if the problem is solved.

0 Former Member over 13 years ago

Just a correction. I've saw now that I've made a mistake.
I had firmware version 7.3 and not 7.5 when things were going fine.
Only now, passing to 7.7 was that the problem appeared.

0 Former Member over 13 years ago

I am still waiting for a solution.

After trying map reinstallation provided by Garmin's assistance, a warning appeared at the 3rd phase of the updating process stating: An unexpected
error has occurred and the program will be closed."

This matter was already reported to Garmin's support, that is looking into it.

I just hope it will be quick, as I had to stop using my GPS already since the 21th December 2011.