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.
I believe the way to tell if it’s the board is when your battery power icon starts acting up. 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. Also you can have a situation where the green light lites up, but doesn’t want to switch to orange. 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. Weird activity with the charging icon is what ultimately tells the tale in my experience.
Where exactly the heat comes from in this situation is hard to say, I suspect the input board is no longer properly regulating the rate at which the power is fed into the computer, as I’ve had this same problem when all the pins and contacts look perfectly clean and bright. For the time being that is, until they start looking cooked, and the plastic starts melting around the pins.
Holding an ice cube on the Magsafe can be an emergency measure if you have the patience for it. The closer you get to a 100% charge, the cooler the Magsafe will run. But once you get to an indicated 100%, everything can seem fine, until you momentarily disconnect the Magsafe, and suddenly it says you’re down to an 80% charge again.
I also suspect that some of the DC-in boards you can get may be counterfeit, and may not hold up as well as the original factory boards, although who can say, as it was the factory board that messed up in the first place.
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8 commentaires
mine was too. too touch to even touch. so i disconnected it. cleaned the connectors with an old toothbrush and noticed that one of the connectors was already depressed slightly. i pushed on it and it didn't click back into position so i tapped the magsafe on the table to try and push it out. and saw that it did. dirt and grime could be the culprit. re attached it. now it's charging again...its heating up the same but not as it did before. seems like i have to buy a new magsafe then.
par fernandezemg
I too have the problem of getting Magsafe connector hot. My observation and analysis are:
DC-in Board pins 2&4 (2nd from either side) are black. Magsafe connector 2&4 pins are pressed down and not fully popped out. hence these pins while touching DC-in Board connector, do not make full contact. They are making loose contact which in turn makes arcing/sparking which generates heat to make Magsafe hot. It is a typical phenomenon you see on household electric plugs getting fused and burnt. Once I cleaned both sides with alcohol and system worked good for some time.
Other thing is once batteries get old, they need more current to charge. Moreover if you are using your MBP and charging it simultaneously, it will require extra current. That much extra current when flows through connector it is bound to get heated up.
In my opinion if the Magsafe pins are not depressed, fully popped out and make firm contact with DC-in Board, the problem is 90% solved.
par Liaqat Ali Khan
I too had this. While checking email Noticed that charging was slow, felt charge port and it was very hot. I lightly pushed in the plug connector wiggled caddy corner as to assure connection and allow connection points to sorta clean themselves and every thing returned back to normal. I will clean the contacts when I get a chance.
par nick DiFerdinando
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par wallpaperappps
Same to my A1286 model it's getting hotter and when I run an application or open a file it run something like in slow motion behaviour... My keyboard suddenly acting like typing different characters...What happen? PLS HELP!
par Romel Conquilla
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