Only turns on when plugged into charger just flashes sony screen

My w810 won't turn on I think it is because for one it won't charge and second when I plug it in to charge it only gets to the sony ericsson screen then resets doing it over and over I have tried to connect to the pc to reflash but it won't recognize it poped up once could not recognize but never again I think it's because it had just a thread of charge left in the battery I think it's a hardware issue i'm wondering if there is something I can do any help would be much appreciated thanks.