Hi Kunix,
I can not reply to private messages as I have less than 15 posts...
Flashed with file from you, it stays now with white blank screen in pre-boot mode without need to depress top left corner of display.
It is seen in Device Manager as GARMIN USB GPS but no storage or drive is seen by Windows..
If I try run webupdater, it says "update fie is corrupted".
If I load a file ( say nuvi13xxand14xxseries_GCDFile__570.gcd, but I tried others too), into webupdater, I get message:
"The Garmin device has returned an error status whilereceiving data packets.
This could be due to a malfunctioning in the Garmin device or an error in this application.
If this error continues, contact Garmin Tech Support"