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I plugged the Garmin nuvi 3790 into my computer and the garmin devise does not come on or light up

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Make sure the unit has been charged while in your car with cigarette lighter adapter. If the unit is charged, try connecting the usb cable directly to a usb port on your computer and not thru a usb hub.Then see if it shows up in my compute. When it does show up then go to the Garmin web site and register your product then install Garmin update. I am attaching a link to the Garmin site. Thanks for using FixYa

Posted on May 17, 2011

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1 Answer

Do i get a free map update for the just purchased Garmin nuvi 3790T How about speed camera.

Garmin provides free online map updates (if available) within 90 days after purchase. A purchase is recorded when the Garmin Nuvi detects a certain travel speed or when the Nuvi is registered at

To qualify for free Map updates, register the Garmin Nuvi at using serial number and owner name.

A map update is a large download - which can take considerable amounts of time. When updating a Garmin map with a PC one needs at least 5Gb of free space at the C drive.

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I need the manual please for Garmin 3790 LMT. Where do I go to get it?

I suggest visit this links:
- Garmin/nuvi-3790LMT/Manual/76352

Hope this helps (remember to rate and comment this answer).

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1 Answer

Garmin nuvi 3790 frozen


There have been no known issues with the 3790 freezing, first thing is try conencting it to the PC for a firmware update using Garmins WebUpdater software. It can be obtained from this link here. .

Hope this helps!

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1 Answer

My garmin is nuvi 3790 where can I find serial no and how can I regester my garmin

You'll find the serial number on the bottom of the unit, inside an outlined box (remove mounting bracket to view). Register your nuvi 3790 by going to Garmin's Registration page, here. Follow the prompts on the screen.

I hope this helps - good luck!

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