Early 2011 model, A1278 / 2.3 GHz i5 or 2.7 GHz i7 processor.

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Battery not charging at all

Ok welll i have problems with my battery charging, i have done a SMC reset, test with differents power adapter and got 2 new battery because i though they where dead. But when the new battery came it works just fine and it read that it had 50% charge and all, but the next they the computer battery was dead and it was with the power adapter and now it wont charge and as i said i have reset the SMC

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Check R7051 & R7052, as well as R7021 & R7022. I mean with a multimeter, when these blow they often look perfect. Further, see if the magsafe light turns orange when the laptop is off.

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Something like this are most likely cause by fake aftermarket chargers or liquid damage.

Can you inspect the chip i highlighted to see if it is any burn marks or corrosion?

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