Hi there and welcome
Just seeing the Garmin logo is an issue and why it is not updating
This is usually an issue with the Firmware, so I would first like you to do this please.
Remove the charger from the Garmin and hold the power button to off for 60 seconds.
Release, then connect the charger and try to turn on the unit and tell me if it gets past the Garmin screen.
Let me know the results please