I have an iPad that is producing error 4013. I tried everything listed on the troubleshooting guide
Model MC705LL/A Version 7.0.4 (11B554a)
The iPad was freezing so I rebooted several times then I tried to update the operating system in settings. The screen is showing the power cord with the iTunes symbol. iTunes recognizes the iPad, prepares it for updating, the apple appears then it stops and says cannot connect to iPhone, no connection. The serial number then disappears from iTunes and the power cord displays on the iPad again. Any advice?? Help please. So frustrating.
iPad, iOS 7.0.4