Re: iphone 4 ошибка 9
#23
Error 9: This error occurs when the device unexpectedly drops off the USB bus and communication stops. This can occur if the device is manually disconnected during the restore process. This issue can be resolved by performing USB isolation troubleshooting, using a different USB dock-connector cable, trying another USB port, restoring on another computer, or by eliminating conflicts from third-party security software.
В общих чертах - проблемы с процом/питанием проца либо непосредственно с шиной юсб.
В древних постах про первый айфон упоминается часто при использовании юсб 1.1