15 - 30 minutos
The power button quit working on my iphone 4 and I had been dealing with it for over 6 months by just letting the screen time out. I finally got sick of that and looked up how much it would be, turns out it was $30 for tools, parts and shipping through here, so I said why not.
It took a long time, and I never thought the phone was going to work again. This was the first time I had ever even opened a phone before. But after 3 hours due to bumping my tote and mixing all the screws up, I got it back together and it works just as new now.
Defiantly use something sticky to put all of the tiny screws on. I had them lined up in a shallow plastic tray and was doing well until I dropped the phone into the tray and mixed all the screws. Also a lighted magnifying glass and some soft tipped tweezers would have been nice.
iPhone 4 and 4S Power and Lock Button
iPhone 4 (GSM/AT&T) Power and Sensor Cable