This is weird but the new buttons don't come with the "click" thingy for some reason, transfer your old power button from your old back housing unit and you should be good, sucks I know but oh well
I had this issue, it means either one of the cameras are broken or if you had it replaced they didn't plug in one of them correctly. I had the same issue, have them or if you replaced it, make sure both cameras are plugged in correctly
It's very easy, remove the 2 screws located at the bottom of your phone besides your charging port From there with your tools available, separate the frame from the phone carefully, watch a video on YouTube to see how they remove a screen and try to follow the same process Your phone popping out is just the display separating from the frame Update (01/06/2018): Okay I see, it's very Simple. get something sharp, like a razor blade Try to get it in between the frame of the screen and the phone and from there don't pry it up but simply drag it across all the edges of the phone in order to remove the adhesive holding down the frame, once you remove the adhevsive or at the very least separate it, get your plastic pry tool and pop up the frame