Chosen Solution
I have followed the guide (iPhone 4S Screen Replacement) to replacing the iPhone 4S display assembly. I believe I did it correctly except for one thing (the 1.5mm screw in step 18 seems to have been stripped on the way out so it is not securely replaced). Now the home button doesn’t work (it won’t depress unless I put a lot of pressure on it), and the screen doesn’t work either. When I turn it on, it starts out gray and with lightly defined vertical stripes that slowly fade out, then it lightens to a brighter gray, then goes dark. Any thoughts would be much appreciated!
sounds like you lcd is broken, replace it with another one. because of all the fake replacement screens there is a lot of trouble with the home buttons, to big, to fat, to slim,… and so on… test the button before you put the phone back together
