What happend with my samsung gear? On display

What happend with my samsung gear? On display

This my samsung gear condition right now, before it can on my gear was on with noise display, after that i was install firmware on my gear then normal until 4 day. And aftter 4 days, my gear cant turn on + twice of button cant press too. Can you explain what happend with my gear right now? Thankyou very much