Iphone 4s dead (Hard Reset wont fix it)

Hi,

My Iphone 4s just died and its not the first time but the "hard reset" has always get it to work again but not this time.

Tried to charge it for many hours but still wont work. Tried with Itunes but cant find the iphone at all now. Guess there is no fix for this more then send it for service? It suxe 😟