4 Replies Latest reply: Jul 21, 2012 5:22 PM by Lester1234
Lester1234 Level 2 Level 2

I'm trying to reinstall ios 5.1.1 but i keep getting an error (21 or 14) but i don't know what to do. and the ipod touch 4g is stuck in recovery mode and my power button doesn't work so i can reset it. fyi the power button has been broken for a while now.

iPod touch, iOS 5.1.1, White ipod touch 4g
Reply by Ingo2711 on Jul 21, 2012 1:02 PM Helpful

Did you already try these suggestions?

Error 20, 21, 23, 26, 28, 29, 34, 37

These errors typically occur when security software interferes with the restore and update process. FollowTroubleshooting security software issues to resolve this issue. In rare cases, these errors may be a hardware issue. If the errors persist on another computer, the device may need service.


Error 13, 14, 35 and 50 (or -50)

These errors are typically resolved by performing one or more of the steps listed below:

  1. Perform USB isolation troubleshooting, including trying a different USB port directly on the computer. See the advanced steps below for USB troubleshooting.
  2. Put a USB 2.0 hub between the device and the computer.
  3. Try a different USB 30-pin dock-connector cable.
  4. Eliminate third-party security software conflicts.
  5. There may be third-party software installed that modifies your default packet size in Windows by inserting one or more TcpWindowSize entries into your registry. Your default packet size being set incorrectly can cause this error. Contact the manufacturer of the software that installed the packet-size modification for assistance. Or, follow this article by Microsoft: How to reset Internet Protocol (TCP/IP) to reset the packet size back to the default for Windows.
  6. Connect your computer directly to your Internet source, bypassing any routers, hubs, or switches. You may need to restart your computer and modem to get online.
  7. Try to restore from another known-good computer and network.

copied from iTunes: Specific update-and-restore error messages and advanced troubleshooting

Reply by lllaass on Jul 21, 2012 1:43 PM Helpful

Error 2000-2009 (2001, 2002, 2005, 2006, 2009, and so on)

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.

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