What should I do if my Mac Book computer has a black screen and cannot be turned on? The computer's black screen cannot be turned on is a relatively common fault problem, and the computer Xiaobai is at a loss for this fault. Is there any way to deal with it? This fault may be a hardware problem, you can try to solve it in the following ways first, come and take a look.
1. Try to enter safe mode:
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Close Mac Book.
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Press the power button. After hearing the startup sound, immediately press and hold the Shift key.
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When you see the gray Apple icon and the progress indicator (looks like a spinning gear), release the Shift key.
- During the startup of Mac OS X v10.4 or later, you will see "Secure Boot" in the login window, even if it is a normal automatic login. During the startup of Mac OS X v10.2 to v10.3.9, you will see "Safe Boot" on the Mac OS X startup screen.
2. Reset PRAM:
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Shut down your Mac Book.
- Then power on and hold down the following four keys at the same time: Option, Command, P and R. Keep pressing these buttons for about 20 seconds, during which time your Mac Book may appear to be restarting. (If your Mac Book makes a startup sound when it is turned on, you can release these keys after the two startup sounds).
3. Reset SMC:[/p][p=34, null, left] 1. Turn off the computer.
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Connect the Mag Safe power adapter to the power source and Mac (if not already connected).
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On the built-in keyboard, press the (left) Shift-Control-Option keys and the power button at the same time.
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Release all keys and the power button at the same time.
- Press the power button to turn on the computer.
The above is the solution to the black screen of Mac Book that I brought to you. I hope it will be helpful to you.