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Mid 2012 model, A1278 / 2.5 GHz i5 or 2.9 GHz i7 processor.

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Batteries won't charge, charger light stays green, turns on automatic

Hello,

I have had a problem with my MBP recently here is the series of events:

One day my MBP stopped charging after the battery died so I reset SMC and it worked. I started having to reset SMC more often eventually resetting SMC/PRAM stopped working. So I purchased new battery and made sure I properly cycled the battery and followed directions. Recently I was travelling and my battery died, SMC/PRAM do nothing and when I plug it in, it automatically boots. I bought another battery, used it down to 10% and turned it off, plugged it in and it automatically boots, the light stays green on the magsafe adapter. The battery indicator at the top of my screen shows the charging symbol but its not charging. Im thinking it may be the I/O board but I was hoping someone could help narrow down my issue,

Thanks!

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Are you using an aftermarket charger?

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I am not, I'm using the 60w magsafe, A1344

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To ge a better idea of what your battery is doing download and run Coconut Battery and let us know your results. The battery indicator on the Mac system is like an idiot light in your car, it really tells you nothing.

http://www.coconut-flavour.com/coconutba...

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Current Charge: 308 mAh

Maximum Charge: 6192 mAh

Manufactured: 2015-05-17

Loadcycles: 1

OS X Battery status: Good

Battery Temp: 26.5 C

Charging With: 0.0 Watts

Battery State: Discharging

BATTERY:

Mnufacturer: Greenbox

Model: A1322

Age: 29 Days

Power Adapter: 60 Watts

EDIT: This is with the charger plugged in, stuck at 5% light is green.

thanks!

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It doesn't look like the new battery has charged at all. This may be SMC chip on the logic board. If it is concave it has failed and needs to be replaced but this is not an amateur repair. You could try a new DC-In board first since they are cheap.

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thank you so much, do you have any idea what an SMC chip replacement would cost, also is there a way you could tell me where the SMC chip is so I can identify if it is failed?

Thanks again

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Most of the time it is jut south of the LDVS cable connector - large square chip.

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jared will be eternally grateful.
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