Macbook Pro Mid-2012 Black Screen

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Macbook Pro Mid-2012 Black Screen

Hello everyone, recently I have my MacBook Pro mid-2012 computer that has suddenly turned off and when I try to turn it on I only hear hard disk starting and nothing else, (No light from the apple behind, no light from the keyboard, No screen) over all my MacBook turns on only if I keep it attached to the charger, if I detach it from the charger it turns off immediately.

What I tried: I tried to do the various resets. (PRAM, SMC ...) I tried to disconnect some things (battery wires, Ram, screen wires ...). I checked the hard disk by connecting it to another pc, and it works. So I think that the problem is the battery or the motherboard, or maybe something else, but I don't know which of these. I await your help! Thanks.

I forgot to mention that when I try to turn it on, it sometimes turns off immediately (I hear the hard disk turn on and then turn off).

MacBook

Posted on Nov 30, 2020 2:31 PM

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Answer 1

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HWTech

Community+ 2026

Level 9

71,186 points

Nov 30, 2020 7:31 PM in response to MisterAlex

It sounds like a bad battery. Disconnect the battery and power on the laptop. Does the laptop work properly when the battery is disconnected and using just the charger? If so, then try connecting the battery again while the laptop is still powered on and let the battery charge at least 10% before disconnecting the charger or powering the system off. Just make sure not to have any of the exposed internal circuitry come into contact with any metal or conduction objects (including a metal table top).

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Answer 2

Dec 2, 2020 7:21 PM in response to MisterAlex

If you cannot run the laptop using only the battery, then either the battery is bad or the Logic Board is bad. Try running the Apple Diagnostics to see if it finds any issues with the charging system including the battery. Also check the condition of the battery by Option-clicking on the battery icon on the menu bar. If it shows "Service" (perhaps Service Now or Service Battery, etc.), then it means there is an internal fault in the battery and it needs to be replaced.

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Answer 3

MisterAlex Author

Level 1

8 points

Dec 1, 2020 1:12 AM in response to HWTech

I have already tried to disconnect the battery and turn on the computer but (screen always off), the battery seems to be 100% charged because if I click the side button it shows me all the LEDs on, but I still can't turn it on without the charger attached.

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Answer 4

MisterAlex Author

Level 1

8 points

Dec 1, 2020 1:13 AM in response to HWTech

HWTech wrote:

It sounds like a bad battery. Disconnect the battery and power on the laptop. Does the laptop work properly when the battery is disconnected and using just the charger? If so, then try connecting the battery again while the laptop is still powered on and let the battery charge at least 10% before disconnecting the charger or powering the system off. Just make sure not to have any of the exposed internal circuitry come into contact with any metal or conduction objects (including a metal table top).

I have already tried to disconnect the battery and turn on the computer but (screen always off), the battery seems to be 100% charged because if I click the side button it shows me all the LEDs on, but I still can't turn it on without the charger attached.

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Macbook Pro Mid-2012 Black Screen

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