We flash 3790.(PCB 8)
And after flash is over and we update nuvi with webupdater and install maps and go outside to lock satellite,then we clear nonvol.
But if we cleare nonvol before flashing and before webupdater we have satellite accuracy problem.(17-127mts)
We spend all day for testing.
Today one another friend flash 3790 to 3490 with clear nonvol before flashing (PCB 8) and he have accuracy problem.(17-127mts)
I flash nuvi back to 3790 and then update all file for 3790 and go outside to lock satellite.
Then friend flash 3790 back to 3490 (not clear nonvol) satellite accuracy is 3-5 mts.