原帖由： Dan ,
Sounds like the connector on the system has deformed. Do a visual inspection comparing it between your girlfriends system. Don't put any metal into the connector as you could damage things. You'll likely need to replace the MagSafe DC-In Board, follow this IFIXIT guide: [guide|10768|MagSafe DC-In Board Replacement] and you may need to replace the AC adapter if the MagSafe contacts are damaged. You may try cleaning with the contacts with some Isopropyl alcohol first if they look dirty.