ok,I think i change de 3790 boot.bin with the 34xx boot.bin(ldr.bin) because i did a wrong thing when trying to buck up with the NV backup sd method, therefore its detected by de updater as an 34xx i dont know how to restore de 3790 boot.bin.
But the good news are thay I could copy the hole unit also an gupdate.gcd archive before it crash maybe these help.
Im afraid of flashing with FW for 34xx because i did not "Now hard reset Nuvi clearing non vol in Debugging menu :hold your finger in Volume page, upper right corner ,landscape position, go to Developer infos/Non vol Statistics, press the 3 Bars menu and Clear Non Vol.Rename Txt ,Voices and Keyboards folders in your Nuvi to another name eg Petx Poices etc."
Tnx.