Non-responsive iPhone 4S screen?

So, I just replaced my Iphone 4S screen and the screen lights up and everything but I'm not able to see anything.

You again eed to go and replace the screen if the new screen also doesn't works its probably your motherboard, which is not working properly, if you are getting a white screen and touch is not working but the phone is working i.e. Voice commands and recieving calls then its your screen or motherboard

What color is the screen? Maybe you haven't connected the ribbon cables correctly, so you'll need to go back and reconnect them again. If you need help, contact iscreensfix.com
I always use them whenever I have a problem with my screen, and they're always happy to help.