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Helpful answers
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Jul 16, 2016 9:57 PM in response to Ron N Harmby whosjose,During the repair, a damage to the logic board can happen. Did you take it to an Apple Store? If so you go back to the store.
Also check out
If you see error 9, 4005, 4013, or 4014 when you restore your iOS device - Apple Support
A user on ifixit stats that it can be a U2 Charging IC.
https://www.ifixit.com/Answers/View/169401/Will+not+restore,+error+code+4013.