I think this is probably a software problem, as described in the how to fix an iPhone stuck in recovery mode article. Maybe you should check out whether your firmware file is compatible with your iPhone version. While error 14 occurs, there are some solutions you can try to fix it, such as use a new USB cable, restart your PC, restore the beta firmware, etc. If this is useless for you, you could try the '''FORecovery''' iOS System recovery tool to help you. I hope this helps. Good luck.