What's wrong with my iPhone?

My iPhone screen has been cracked but I was still able to use it. However, my screen recently shut off and went blank. I thought my phone died but it would still vibrate even though the screen was black. Now it's just unresponsive. Anyone have any idea what could be wrong with it?

If you damaged it from dropping it, internals may have cracked or snapped inside along side with wires and fragile electronics being damaged. I'm afraid once a iphone screen goes black after being cracked your phone is gone. But schedule a apple appointment before you take my word on that

Yes

It's broken

Because it's an iPhone