When replacing your LCD on a iPhone?

I replaced my broken screen and LCD on my iPhone 5c. After replacing it, my lock button, volume button, and flashlight/camera light doesn't work. What could've gone wrong? Or how can I fix it?

It's likely that while replacing the screen, you damaged/moved the wires responsible for those functions
It's probably an easy fix, just pop the screen off and have a look, there will likely be a visible problem