what is error code 14

http://support.apple.com/kb/ts3694

Check USB connections

If there’s an issue with the USB port, cable, dock, or hub, or if the device becomes disconnected during restore, try troubleshooting the USB connection, then troubleshooting your security software.

Common errors: 13, 14, 1600-1629, 1643-1650, 2000-2009, 4000, 4005, 4013, 4014, 4016, “invalid response”, and being prompted to restore again after a restore completes.

To narrow down the issue, you can also change up your hardware:

• Use another USB cable.
• Plug your cable into a different USB port on your computer.
• Try a different dock connector (or no dock).
• Add (or remove) a USB hub between your device and computer.
• Connect your computer directly to your Internet source, with no routers, hubs, or switches.

If you see your error after changing your USB connections, continue to the next section to troubleshoot your hardware.

My wife's phone kept repeatedly giving error 14. I tried the "official" list of fixes that Apple likes to post, but no luck. I decided to try charging the phone overnight, then try it again. It worked! Note that I had to charge it via the wall outlet. The phone didn't seem to charge via any of the USB ports on any of our computers.