Dear All, I was buy a bad iPad 4, when I would like to upgrade itunes return error 4005. The seller said that, he has got same error. He has recieved this error first, when he would like to upgrade to iOS7.1.1bGM. If I hold the power and home button for long time -> nothing happen. If I hold the home button, open itunes and connect USB -> nothing happen. The display always black (don't turn on). I could put in DFU mode. When I would like to restore itunes: "Wait for iPad device" an I wait for around 10 minutes and recieve an itunes message: unknown error 4005. Do you have any ideas?