Drop the phone and shatter the glass back panel. Had one of those iphone 4 vinyls on so it held it together for a while.
The power/sleep button had no feed back? It functioned when pressed but later on it decided to not wok at all.
Bought a transparent back panel, the iphone 4 liberation kit to replace the 5 point pentalobe screws and added a very small spring under the power/sleep button.
no advice, just simple repairs here. only need to follow the guides provided.