Having to wiggle the Magsafe to get it to charge is also a bad sign, and logically would seem to indicate that the problem is mechanical, but you may still need a DC-in board even if all the visible parts look secure. Also you can have a situation where the green light lites up, but doesn’t want to switch to orange. For example, the icon will say you have a 70% charge, but when you momentarily unplug the Magsafe, oops, now it says you have a 45% charge, indicating that something is going on with the board, and it’s simply not sending the proper information to the rest of the computer anymore. I believe the way to tell if it’s the board is when your battery power icon starts acting up. I certainly recommend trying all of the easy fixes, but I’ve had this problem several times on my mid-2012 15” Pro, and each time it was the DC-in board.
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