Hello, how can i fix an asus zenpad c7 that doesnt want to turn on, it seems that its been drained its battery dead but i cant charge it. It was dropped by kids so many times. I can hear and feel its vibrating when i pressed the on/off button but screen doesnt show anything. Any help please.

I sent it 1 time to seevice center and they said the relay was dislodged and battery was drained dead. Thanks in advance.