Thread: Nüvi 3790

Originally Posted by Neil

If there is some corrupting data remaining following cross-flashing which isn't removed by CLEARING non-vol before and after the flash, it's quite possible the device will be fine ... at least for a while and maybe even forever. However even a few bytes of bad data can potentially cause the device to crash and turn off, freeze, spontaneously reboot, boot-loop, or worse, die completely with no reaction to the power button. So not clearing nonvol might have no consequences, or result in a minor inconvenience, or prove fatal... i.e. a "dead" (as in "never-turn-on-again") device.

Today I took a trip with the route programmed in the nüvi and there was a moment when it turned off and restarted by itself. The curious thing is that it has continued with the planned route it had.

Can this also happen again if I convert it to a 34xx?

Originally Posted by Neil

Try this: Select the Locale/Language then take it outside to get a satellite fix to see if it then goes to normal boot when re-started. It might take a while to get a good fix after a comprehensive re-set even if it was not fully executed.

Yes that's how it is. Last night I was inside the house and I had no satellite reception, it seems that was it.

Originally Posted by Neil

No, unfortunately that's not possible. The visible file system (contained in region 48) can be re-formatted of course but that won't help anything with this problem, it's not caused by what can been browsed and removed in Mass Storage Mode. The actual OS is a close-held propriety secret, it was loosely based on Linux but is far removed from that now and there's no install media available like with other operating systems.

I am learning more every day about this curious operating system. Also, to my sadness, I am assuming and getting the idea that my nüvi 3790 will never be the same again. Damn the time I updated it.

Originally Posted by Neil

Ah well, it's a 3700 forever now or convert to 3490 and suffer the inherent problems. If the corruption in region 41 cannot be removed then it's over sorry.

Neil, it is true that we cannot do a complete erase of region 41, the tests carried out confirm it, can we do a format of that region? For example, in Ms-dos, a command (del), (deltree) or (format) is not the same as having different operations and results as far as write elimination is concerned.

Neil, would it be possible to transform to 34xx in terms of recovering voice commands, bluethoo, DEM maps, 3D maps, real view (JVC) but with the satellite controller (GPS) (PCB controller?) of the model 37xx? I mention this, because if the 37xx model's radar controllers could be used, we would possibly avoid the car's jumps and the inaccuracy of the GPS.