Is my dear Garmin Fenix 3 dead?

Hi everyone!

I need some advice to revive my dear Garmin Fenix 3. After a surf session it suddenly shut down (I make thousands of surf session with my Garmin Fenix and it still working then). Then I achieve to switch it on again but now when I press on button nothing happen... Impossible to navigate in any menu of my swtach. I can only switch on/off and heard "bip" when I remain press too long on some button...

Does anybody ever seen it? What could the solution?

Thank you for reading :)

Regards,

Kevin