Chosen Solution
I was able to hear the phone ring and msgs were sent. However, I do not hear anything at all and the screen is black. I need HELP!
Sounds like you need a whole new display assembly iPhone 6s LCD and Digitizer Replacement [linked product missing or disabled: IF314-037-3] If you’re going to do the repair yourself. Make sure to purge the phone, hold down the power button, after you’ve disconnected the display and the battery, for four seconds. If you’re not going to to the repair, either take it to a qualified repair shop, or just to Apple. A poor repair shop will cause you more problems
The fist thing id do is follow the guide posted by iMedic posted above (or below) but check the screen assembly ribbons are all connected properly and are clean and secure, this could just be a loose or dirty connection, but iMedic is right is does sound like you’ll need a new screen.