1. Make sure that you have installed the iTunes on your PC.
2. Then connect your device to your computer and open iTunes.
3. Afterwards press and hold together the Home + Power button for a short while.
4. Release Power key as soon as screen goes black.
5. Keep holding the Home button until the device goes into Recovery Mode.
6. Excellent! You are right now in the desired mode.
1. In order to begin, press and hold Home button + Power button.
2. You can let go of the Power key when the device goes black.
3. Release Home button only after the Apple logo appears on screen.
4. Bravo. Thanks to following those three steps, your device should be working normally again.