Super common mistake, GUYS DO NOT PULL ON THE CABLE!!! IT WILL BREAK AND YOU WILL BE LEFT WITH A USELESS SCREEN! Follow what everyone above is saying, be patient and make sure it's not being pinched in the back.
I agree, replacing the loudspeaker is cheap and SUPREMELY easy. Here's an instructional on how to do it https://www.youtube.com/watch?v=gjoi0u3y.... Also there could be an issue with your docking connection. Try cleaning that.
