Phone works but the screen is black

I was using my phone on the way to a restraunt and turned it off and then when i try to turn it on again it wouldn’t. Google assissant was working and i could answer and make calls and get nonifications. It is currently on for now but if it turns off i have to keep manually resetting it by holding down the power button and volume down button. I cracked the screen at the begginning of this month but it just barely started doing this. Does it have anything to do with my screen being cracked? I also have a green line going down it. Is there any permenant solution to phone so i don’t have to keep turning it on and off?