My wife's iPhone 4 power button has stopped working. It doesn't "click" down and when pressed, nothing happens. I'm wondering what parts need to be replaced. I have found the power button replacement, but I'm not sure that replaces the button part that is broken? http://www.ifixit.com/Guide/Installing+iPhone+4+Power+&+Lock+Button/4332/1 This walk through specifically says its not going to fix the switch part of the power button. Help!!