In some cases, Mac users may experience a system crash when a black screen is displayed when the computer tries to wake up or the user opens the MacBook cover, although the devices are in an active state, as indicated by key illumination or sound alerts. If you have a similar problem – do not panic. Most likely, you will be able to cope with it on your own using the instructions published below.
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Check Screen Brightness and Power Settings
Before you perform any actions, make sure that the screen brightness is at the maximum level (you can increase the brightness with the Fn + F2 key), the Mac works and is connected to a power source. If your Mac uses an external display, make sure it is also on.
Turn Off and Turn On your Mac
Sometimes models MacBook Air faced with such problem as black screen after sleeping. Often shutting down and restarting the computer will be enough to solve the black screen problem when exiting sleep mode. You can force a reboot as follows:
- Press and hold the power button on the Mac until the computer turns off;
- Wait a few seconds, and then press and hold the power button until the Mac starts to boot.
Fix Mac Black Screen via Reset SMC and NVRAM
If your Mac repeatedly displays a black screen when you wake up from sleep mode, reset the System Management Controller (SMC) and NVRAM. Owners of modern MacBook models can do the following:
- To reset SMC, first Turn off your Mac;
- At the same time, press and hold for 10 seconds the combination: Shift + Control + Option (Alt) + Power button;
- Release the keys at the same time;
- Turn on your Mac;
- Next reseting NVRAM;
- Turn off Mac;
- Turning on the computer, hold down the four keys: Cmd + Option (Alt) + P + R keys for 20 seconds;
In most cases, resetting SMC and NVRAM will help resolve display and power issues.
If you reset the SMC and NVRAM settings, increase the screen brightness, make sure that the computer is turned on and connected to the power source, but the Mac continues to display a black screen when you exit sleep mode, you must reinstall the operating system. Reinstalling the OS can be done without formatting the hard drives, but it’s better to play it safe and make backups.
Detailed instructions can be found at the link to my earlier article: How to Reset Mac to Factory Settings?
If the above methods didn’t solve the black screen problem, I’m afraid that contacting Apple specialists is inevitable. In rare cases, the cause of this situation may lie in the hardware or be associated with other undetected malfunctions.