iPad Mini 4's Screen is Black and Unable to Reset.

My iPad mini 4's screen is black. I had it on the charger yesterday and left it while I went to go eat lunch. I came back and it had a black screen and I could hear siri. I tried resetting so many times. I even tried a hard reset. I could hear siri at first but I cannot speak to him due to me resetting too many times and not being connected to wifi. I need help, My iPad is my life.