IPHONE SCREEN CRACKED AND WENT BLANK?

I dropped my iPhone 4 and it cracked. It still turns on because when I click the Mute button on and off it vibrates and when I plug it up to charge it it vibrates but the screen is just Blank I can't see anything.

However I've herd that if you get the screen fixed it solves the problem. Is that true?

If not please Help!

Lol you dropped a iphone 4 I'm pretty sure if you google it you will most likely find how to solve your problem