[tpmx]

I recently repaired a family member's iPhone. A crappy Lightning cable had been used and the tip metal piece of the plug had somehow broken off and gotten stuck inside the socket.

Like this:

https://www.ifixit.com/Answers/View/163391/lightning+connect...

Here's a decent 2 minute video that explains the problem and the fix:

https://www.youtube.com/watch?v=eujHf-ry8zw