I've a trouble. When I trying to turn on the Garmin it does not work, but if I connect it via USB the following screen appears ?? Will it be a battery problem?
The sun with exclamation point icon indicates that the device is too hot to charge. If you're seeing this while it isn't actually too hot, please try updating the firmware of the inReach Mini to 2.80 using Garmin Express. This article has steps: Updating the Firmware and Syncing Account Information to an inReach Mini
If after updating it's still showing that symbol when charging at normal temperatures, please contact Product Support directly as twolpert mentioned.