1) Garmin alpha 100, 4.40,

2) I tried to install the 156201000440.rgn i put it in the RGN_tool and i choose the FW 450 and confirm to .gcd i open the new file with the webupdater. I open the device and it starts to upgrating then it stops to garmin logo.

3) Symptoms: stucks in garmin logo

4) Does your pc sees your device ? NO

5) List all the procedures you already tried to unbrick it and their results and errors messages obtained. NOTHING

6) Do you have Garmin USB Drivers installed ? Garmin: USB Drivers Updates & Downloads YES

7) If you don't know HWID get it by Use program G7ToWin to retrieve your HWID

8) Write down if you already read or tried GarminCure3 tool - the new way to create cure firmwares for Garmin devices
How to unbrick a nĂ¼vi - step by step guide NO

9) Can you reach preboot mode? If no ,have you followed this? Garmin Updater.exe v.2.8.0 No

10) Probably no , but do you have NV backup? NO