i5永遠沈睡了！！！！

http://support.apple.com/kb/TS3694#error2001

If you experience this issue on a Mac, disconnect third-party devices, hubs, spare cables, displays, reset the SMC, and then try to restore. If you are using a Windows computer, remove all USB devices and spare cables other than your keyboard, mouse, and the device, restart the computer, and try to restore. If that does not resolve the issue, try the USB issue-resolution steps and articles listed for Error 1604 above. If the issue persists, it may be related to conflicting security software. If the errors persist on another computer and known-good USB cable, the device may need service.

Error 1604
This error is often related to USB timing. Try changing USB ports, using a different dock connector to USB cable, and other available USB troubleshooting steps (troubleshooting USB connections. If you are using a dock, bypass it and connect directly to the white Apple USB dock connector cable. If the issue persists on a known-good computer, the device may need service.
If the issue is not resolved by USB isolation troubleshooting, and another computer is not available, try these steps to resolve the issue:

Connect the device to iTunes, confirm that the device is in Recovery Mode. If it's not in Recovery Mode, put it into Recovery Mode.
Restore and wait for the error.
When prompted, click OK.
Close and reopen iTunes while the device remains connected.
The device should now be recognized in Recovery Mode again.
Try to restore again.
If the steps above do not resolve the issue, try restoring using a known-good USB cable, computer, and network connection.

http://support.apple.com/kb/TS3694＃error2001

如果您在Mac上遇到此問題，請斷開第三方設備，集線器，備用電纜，顯示器，重置SMC，然後嘗試恢復。如果您使用的是Windows計算機上，移除所有USB設備和備用電纜以外鍵盤，鼠標，和設備，重新啟動電腦，並嘗試恢復。如果不解決這個問題，請嘗試USB問題解決的步驟和為錯誤1604以上列出的文章。如果問題仍然存在，這可能與安全軟件衝突。如果錯誤仍然存在，在另一台計算機和已知良好的USB電纜，該設備可能需要維修。

錯誤1604
此錯誤通常與USB定時。請嘗試更改USB端口，使用不同的基座連接器連接到USB電纜，和其他可用的USB故障診斷步驟（USB連接疑難解答。如果您使用的是碼頭，繞過它直接連接到白色的蘋果USB基座接口電纜。如果問題仍然存在一個已知良好的電腦上，該設備可能需要維修。
如果問題沒有得到解決USB隔離故障診斷，和另一台計算機上不可用，請嘗試以下步驟來解決問題：

將設備連接到iTunes，確認設備處於恢復模式。如果它不是在恢復模式，進入恢復模式。
恢復並等待錯誤。
出現提示時，單擊“確定”。
關閉並重新打開iTunes，同時保持連接的設備。
該設備現在應該恢復模式中的確認。
再次嘗試恢復。
如果上述步驟都無法解決問題，請嘗試恢復使用一個已知良好的USB電纜，計算機和網絡連接。