Answer to: Error 27 or 9 with blue screen - can't startI had error code 9 and blue screen when trying to restore after new screen and battery from water damage. I found a video that said the four screws that hold down the cover for the screen, speaker and front facing camera are different lengths. It said if you put too long of a screw into the bottom right hand hole, it can push on the motherboard and cause the blue screen. They said remove that screw and try with the hole empty. It worked like a charm, I now have a perfectly working iPhone 5S! Hope this helps.