I managed to fix this. Open the watch, take photos first, and then try pressing down on the two batter connections in the white connector from the battery. If this does not work, disconnect the battery…
Same exact thing is happening on my brand new Garmin 68s that I bought yesterday from Cabela's. Works fine plugged in , unplug it and the screen fades out and you cannot use the device.
I am sorry you have the issue. It is highly unusual for a new device to have the type of issue your GPSMAP 68S came with. If you haven't already, please be sure to return it back to Cabela's for…
Did you tried to shutdown the Mac before disconnecting the cable?
I managed to fix this. Open the watch, take photos first, and then try pressing down on the two batter connections in the white connector from the battery. If this does not work, disconnect the battery. Then unclip each of the terminals and then push them back into the white connector and reconnect. It worked for me. Took me a few hours of troubleshooting to check f the battery was getting charge etc. Cheers.