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Early 2011 Model: A1278 / 2.3 GHz i5 or 2.7 GHz i7 processor

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My MacBook not charging!, my charger showing green light...

like ever, I turned my MBP on last night and attached it the charger

but though my battery was 92%, it doesn’t start charging.

Its a long time I'm seeing “Service Battery“ message but never cared that because it has only 350 cycles.

now the battery is drained and can’t run MBP.

I’ve done almost everything you thought (reset SMC, reset NVRAM, …) but it didn’t return.

I’ve removed the battery and when trying to power on, SIL blinks three times repeatedly and nothing happen but if I hold the power button for couple of seconds and then connect the magsafe adapter, it turns on with fan at the highest speed and some limitations like no backlighting, not working DVD rom and no booting the Win OS…

pls help!!!

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Your Mac should start without a problem even without battery plugged in, simply by plugging in the magsafe alone, without pressing anything. What you’ve done is bypassing the SMC and since that seems the only way to start it, the “service battery” was there most probably because of a SMC related logic board failure. There isn’t much one can do on a DIY basis, board needs in depth testing and a component level repair or a replacement.

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Are you using genuine apple charger or after market charger? If it is original apple charger, the machine should boot without the battery connected.

The 2011 models has HDD cable failure issue but your issue don’t seem to be the cable problem. Make sure you are using original charger. The aftermarket chargers do not have enough current and cut off like the original so it is random luck.

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Yes, the charger is genuine.

It was in the box with the MBP when I purchased it

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@hsnmapar Sorry. I was out of country for family matters. I assume it is SMC glitch or you may installed the High Sierra. There were many people had the same problem with the update even we warned them not to update.

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I didn't update my os to high Sierra, it's Sierra

Thanks for the reply

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