8/27/2023 0 Comments Mac keyboard lights not workingThe System Management Controller (SMC) governs the entire MacBook power-on process. ![]() Any of these components gone wrong could cause your MacBook won’t turn on.įrom the moment you press the power button or Touch ID button, to the MacBook displaying the image on the screen, your MacBook has gone through a series of complicated power-on events. A MacBook consists of the following components: a screen, keyboard, touchpad, battery, SSD drive and a logic board.
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