Chosen Solution
I have replaced my front panel on my iphone 4. He start only with the usb cable on. He loops on restaure mode. Any idee on it? thx
Finally ifix it, it was a bad connection between battery and connector!
Solution for Error 1611 : 1- Change the USB port the phone is plugged in to. Do not plug the phone back in yet. 2- Reboot the computer then plug the phone in and immediately restart the phone in DFU WHILE CONNECTED to the computer. 3- Hit restore.