Garmin Epix Pro Gen 2 keeps rebooting endlessly

I've been using Epix Pro Gen 2 for six months. After the function of turning on the screen with a hand-raising gesture stopped working, I turned off the watch through the menu. After this, the clock does not turn on completely. When I press the "Light" button, the initial screen with the "Epix Pro" logo appears and after 20 seconds the screen turns off for 4 seconds, after which the screen with the "Epix Pro" logo turns on again for 20 seconds and then the screen turns off again for 4 seconds. This cycle repeats for several hours. When you press and hold the "Light" button, the watch turns off completely. When connected to a computer, neither Garmin Express nor WebUpdater detects the watch.

Please tell me how to solve this problem.