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Mis sur le marché en juillet 2018, le MacBook Pro 15", modèle A1990, est muni d'un écran de 15,4 pouces avec rétroéclairage LED et technologie True Tone et d'un processeur 6-core i7.

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MacBook won't turn on or charge after replacing keyboard and battery

After replacing the keyboard and battery, a1990 does not show signs of life and does not respond to turning on or charging.

I tried:

1. Reset SMC & NVRAM - no signs of life.

2. I tried to restore a1990 using MB16m1 DFU- a message appeared on "Cannot Use ThunderBolt Accessory", on MB16m1, but a1990 did not switch to the DFU mode.

Any ideas what's going on?

Is it possible to consider "Cannot Use ThunderBolt Accessory" a sign of life and performance a1990?

Will a1990 run on mains with the battery disconnected?

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Why did you replace the upper case (keyboard & battery assembly)?

And was the system working before?


In the basic state before the repair, everything worked (except for the sticking of the buttons and the low battery life), after the repair the system did not turn on.

there was no topcase assembly in my city, and it seemed not economically feasible, I bought a macbook m1 pro 16, I wanted to restore a1990 on a budget


Did you transfer the Power button over to the new uppercase? The power button of your logic board must be transferred as well.


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Solution retenue

Strip it again and check you haven’t pulled a board connector. Solder connections can sometimes break if handled incorrectly. You might need a microscope. Or the parts you fitted aren’t compatible.

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Роман Абрамов sera éternellement reconnaissant.
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