This tutorial shows how to restore an iPhone via DFU mode when the home or power/sleep button is broken.
Download your iOS Firmware/Software:
You always have to use the newest version available for your device.
iPhone is off and won’t switch on!!! AHHH – calm down. Usually you can press home and power button for 30 seconds and it switches on again, but that won’t work in your case. Wait a few hours and plug it into the power socket. No matter what, your phone is NOT broken. This is safe (obviously now warranty from my side).
Fix Error 3194: www.ohguideme.com/2013/07/07/fix-itunes-error-3194/