My smartwatch do not work anymore, maybe display lcd?!

I don’t know if my smartwatch get an hit were has broken lcd. There are not any visible sign or any broken glass…. But when I charge up I show some “flashing” under display. smartwatch do not turn on, and I think that display is broken or battery falling… anyone help me?… If I can I try to post some screenshot when I come back. Thanks in advice to all