![]() However, if this method still can’t fix MacBook black screen, there should be something wrong with the startup disk. About 5 seconds later, you can press the Power button to turn on your Mac computer.About 15 seconds later, you can plug the power cord to your Mac again.If you are using a desktop computer, you can follow these steps to reset SMC: Wait for a while and then you can press the Power button to turn on your Mac. ![]()
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