error 3014

Error 1004, 1013, 1638, 3014, 3194: These errors may be the result of the connection to gs.apple.com being redirected or blocked. Follow these steps to resolve these errors:

Install the latest version of iTunes.Check security software. Ensure that communication to gs.apple.com is allowed. Follow this article for assistance with security software. iTunes for Windows: Troubleshooting security software issues.Check the hosts file. The restore will fail if there is an active entry to redirect gs.apple.com. Follow iTunes: Advanced iTunes Store troubleshooting to edit the hosts file or revert to a default hosts file. See section "Blocked by configuration: (Mac OS X/Windows) > Rebuild network information".Try to restore from another known-good computer and network.If the errors persist on another computer, the device may need service.

The "device may need service" means a hardware problem. In that case make an appointment at the Genius Bar of an Apple store.

Apple Retail Store - Genius Bar

3014

Restoration of code 3014 will not work?: Apple Support Communities

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