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Today i recived nuvi 3790 with broken screen :)
I take board from 3790 and add it in 3490 unit and i have now working nuvi :)
Here is pictures like i promised ;)
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Report about accuracy please ;)
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Now when is still 3790 is about 23 meters but we have bad weather.
I charge now battery and then i will modified it in 3490 ;)
Will report accuracy :)
When i will have more time i will also try to take board with GPS chip from 3490 and add it in this nuvi.
For change GPS board i must resolder wire that is visible on picture 5.
p.s.
3790 and 3490 have the same number on GPS chip.
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Lolypop000,
I have the same problem like you with a 3490 and tried to connect 3790's PCB to 3490's LCD and touch screen, but I cannot because it has different connectors not like 3790's and I cannot connect 3790's PCB to 3490's LCD and touch screen.
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I don't know why you don't have the same connectors i have the same.
Do you have some picture of your board and flat cable of screen?
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3 Attachment(s)
Here are the pictures of PCB of 3490 and 3790.
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3490 PCB is on the right of the first photo and 3790 is on the left side.
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I have on 3490 and 3790 blue board.
Maybe Giomen know why you have green board on 3490.
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3490 connectors - are incompatible with 3790.
only transient (hybrid) models are compatible with each other.
color psb in 3760 - blue, in 3490 - green - but there are exceptions.
I have a transitional model - 3490 - but the display from 3790 and gps chip mt3328 not nl5500 -and positioning accuracy of about 5-9 meters
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@Caty
After transformation from 3790 to 3490 accuracy is 7-12 meters :)