Black screen but phone works including touch

I dropped my Nexus 6. It still works, including the touch screen, except that the screen doesn't turn on. The glass is cracked, but like I stated touch does work. The phone boots up and powers down as expected. I can receive phone calls and talk on the phone. I can use voice commands via "OK Google" to have it read my text messages when they are received and to reply to them. Will this problem be fixed with just a straight screen replacement? Or do I likely have some other issue too?