Chosen Solution
I had a cracked glass on my 1520 it worked for a while until it started opening and closing apps all by itself. I ordered a replacement glass, watched many videos and read all I could. I was able to change the glass without an issue it seems. Now my display is completely white. I have repaired my iPhones and this did not appear to be much different.
Perhaps you have lost some important parts.You can check it to find out.
