What is your splash number in inventory page?
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Download and extract rar
Turn on nuvi
press 10 sec battery icon to enter hiden menu
connect nuvi to pc
drag 097201000580.rgn to updater.exe
click dot beside usb and click OK
When flashing is over nuvi will conect in mass storage mode
disconet nuvi from pc and turn on normaly.
You now have garmin logo :)