If your're curious about the power button on your old iPhone, here is an image of the flex cable: http://phonedoctors.com/wp-content/uploads/IMG_5133.jpg http:/

If your're curious about the power button on your old iPhone, here is an image of the flex cable: http://phonedoctors.com/wp-content/uploads/IMG_5133.jpg http://phonedoctors.com/wp-content/uploads/IMG_5133.jpg The top left piece is what is pressed by the external power button. The small black dot is raised, and wears down over time, eventually failing to make contact with the external button. The cable just needs to be replaced and can be found online for ~$5.