@Naxmon
If your pc sees nuvi , format it following this:
[Only registered and activated users can see links. Click Here To Register...]
At restart ,nuvi will recreate its GarminDevice.xml then run Webupdater to get needed files.
I hope you havent damaged nuvi NV flashing unproper firmwares.
Every nuvi has an HWID and cant flash a different HWID firmware, it can kill your nuvi.