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My MacBook Pro doesn't turn on unless it's connected to wall

Hi,

I've got a MacBook Pro 13" mid-2012 standard configuration and a strange thing happen:

- I'm unable to turn on the computer unless the mac is connected to the wall.

- I press the battery indicator button and nothing happens.

- It has a good battery

- The power button is OK

- I connect the computer to the wall and then I'm able to turn it on with the power button and the battery indicator button shows the level of charge.

- When the computer is On, I can disconnect the magsafe and everything it's OK.

- If I turn off the computer being disconnected to the wall and then I try to Turn it on, I unable to do so, forcing me to connect the magsafe and then I can press the power button and everything works.

What could it be?

Thanks.

Update (12/26/2017)

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:-(

Update (12/25/2017)

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This is with the MagSafe disconnected :-(

Answer this question I have this problem too

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2 Comments:

Lets get some additional diagnostic info.

Download this gem of an app so we can see the battery and charging logic health: CoconutBattery. Paste a screenshot of the main window of the app with the MagSafe connected and a second with the MAgSafe disconnected. Paste them here in a fresh Answer so we can see.

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@urzua - Did you do one with the MagSafe connected? I see two posts of the same image.

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