My MacBook Air has a black screen won’t turn on or charge

Check power connections

Make sure that your power cable is undamaged and plugged securely into your Mac and a working electrical outlet.

Press and hold the power button

Press and hold the power button on your Mac for about 10 seconds. (Every Mac has a power button. On laptop computers that have Touch ID, press and hold Touch ID.)

Then press and release the power button normally.

Unplug accessories

You could have an issue with one or more accessories or their cables. Unplug all accessories from your Mac, including printers, drives, USB hubs, and mobile devices. Then repeat step 2, above.

If you see nothing on your screen

Start up from macOS Recovery, if possible

1. Press and hold the power button for 10 seconds again to make sure that your Mac is turned off. 
2. Press and hold the power button. As you continue to hold the power button, your Mac turns on and loads startup options. When you see Options, release the power button.
3. Click Options, then click the Continue button that appears below it.
4. When you see the Utilities window, use Disk Utility to repair your startup disk, then restart your Mac. 
5. If your Mac restarts to a blank screen again, reinstall macOS.

• If you're using a Mac with Apple silicon or the Apple T2 Security Chip, you might need to revive or restore the firmware of your Mac.