The MacBook family was first introduced in May 2006 and replaced the iBook as Apple's consumer laptop.

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Can false polarity in the charger cord cause death to DC-in?


i fixed my cord, but because the crack in the cable was at the very end of the cable (at the magsafe) i used another magsafe-cable (from a replica charger, which also broke). I connected the outside cable (which is not coaxially located, but instead just besides the inner cable coating) of the working replica with the coaxially outside wire of the original charger. Same with the inner wires.

When i tried it, it didnt work, no led, no charge.

But now, if i use a normally working charger, it just uses it as power supply, no charging. But the macbook also works with battery.

The only problem is, it doesnt charge the battery.

So is it possible, that a false polarity in the cable cause a break down of the charging-tool inside the book?

thx, stefan.

(i already tried PMU and PRAM reset)

Answered! View the answer I have this problem too

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First you must be sure your "normally working charger" is fully functional by testing it on another MB. If so, then you should replace the magsafe board (cheap part and easy to replace). If it does not work then your logic board could be damaged.

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Thanks for your answer! Yes, the charger works fine on another macbook.

Is there any way to find out, that the magsafe board is really the problem? I'm really looking forward to replace this, but if it isnt the problem...

Or is it the only possibility, that such a charge-problam occurs?


The magsafe board, the battery charging board or the logic board are the 3 parts that should be tested to find out what's happening with the battery charging function. To test these parts the only way is to replace them by known working parts. I would begin by the magsafe board then the battery charging board since these two parts are less expensive then the logic board. Sorry that's the only advice I can give in your case.


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