Hi Man
I had exactly the same. It's because of the last update. It bricked your device. Looks like a faulty update. Some devices got bricked. I brought it back to Garmin. Since it has no warranty they offered me a refurbished device for 108,- 💶.
I a an technician, and didn't find a way to fastboot the device. The connection will be lost after a few seconds.
You could use solder points, and try to reflash. But if the seal is broken, they don't exchange it for a refurbished one.
Good luck
Bookmarks