Error 4013 after changing Logic Board (tried everything)

The most common thing when getting Error 4013/4014 is a hardware issue. But in can also be caused by a faulty cable or port. I dont think the charging port or cable is at fault.

You said that you checked the logic board in two different iPhones and it didn't work on the "bad iPhone". But then you took the "iCloud locked iPhone" logic board and put it into either phone and it worked. So the logic board is not ruined.

I have a few things you can try out to fix the error/issue:

1. I see that you tried taking the face camera and proximity/flex cable off, but did you replace it? If you replace this it will maybe fix the error 4013/14.

2. There is something called the long screw damage. This is caused by screwing in the wrong sized screw to the EMI shield plate covering the cables connecting the screen to the device. This can cause a logic board damage.

3. If not this helped you can try this:

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1. Connect to iTunes on PC or Mac in recovery mode, start recovery.

2. When you see the "Spinning wheel" on iPhone's screen - EJECT THE CABLE IMMEDIATELY!

Wait for about 10 seconds

3. Than reinsert the cable - the restoration process may begin.

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I hope anything of this helped you:)