Resposta para "iPhone 4 is working but screen is black?"1.Hold the Power button for 3 seconds 2.Hold the Home button without releasing the Power button for 10 seconds 3.Then the Apple Logo appears, and everything works as usual First hold power button for 3 sec and dont relase it! and after 3 sec hold power and home buttons for 10 sec. For 5 sec u must see Apple logo. If u dont see the Apple logo try go to the specialist. If u see Enjoy working i phone5!