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Mike
Mike, Mac Medic
Category: Mac
Satisfied Customers: 8844
Experience:  Over 20 years IT experience with Apple computers in publishing, marketing and design.
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Screen is dark after turning it on, I believe it's is

Customer Question

Screen is dark after turning it on
JA: What OS X (Operating System, e.g. Sierra, El Capitan, Yosemite, etc.) or iOS are you runninng?
Customer: I believe it's is yosemite it is my daughters
JA: Have you installed any updates recently?
Customer: i highly doubt she has
JA: What troubleshooting have you tried?
Customer: Just started the process and thought i would check the net before making the trip to apple store
JA: Anything else you want the Mac expert to know before I connect you?
Customer: That should be it
Submitted: 1 month ago.
Category: Mac
Expert:  Mike replied 1 month ago.

Hi, welcome to justanswer.com! My name is Mike.

I am going over your question and I will be with you shortly.

Expert:  Mike replied 1 month ago.

OK restart and hold the Shift key until you see the Apple logo. If you can't restart from the Apple menu hold the power button for 10 seonds to shut down, then start it up and hold the Shift key... This will activate Safe boot and it will check the drive for errors among other things. It may take longer to boot and you may see a progress bar during part of the process. If it starts up OK, login then restart the normal way from the Apple Menu. Let me know after.

Customer: replied 1 month ago.
I hear the start up noise but nothing on the screen, still black
Expert:  Mike replied 1 month ago.

What year and model Mac is it?

Customer: replied 1 month ago.
Macbook Air purchased last year
Expert:  Mike replied 1 month ago.

1. Shut down the computer.

2. Plug in the power adapter to a power source, connecting it to the Mac if its not already connected.

3. On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time, if it starts up you held the power button before the other keys, try again.

4. Release all the keys and the power but

ton at the same time.

5. Press the power button to turn on the computer.

6. Press and hold the Command-Option-P-R keys before the gray screen appears. (You have to do it pretty fast if you miss it just shut down by holding the power button for 10 seconds then start it up and continue with step 6).

7. Hold the keys down until the computer restarts again at least twice.

8. Release the keys.

Expert:  Mike replied 1 month ago.

Did you try that?

Customer: replied 1 month ago.
no luck. Still dark screen
Expert:  Mike replied 1 month ago.

Are you sure it is shut down do you hear the startup chime when it starts?

Expert:  Mike replied 1 month ago.

Did you hold the power button for at least 10 seconds first?

Expert:  Mike replied 1 month ago.

Do you still need help? You never replied.

Expert:  Mike replied 1 month ago.

Black Screen Issue:

Hold the power button for 10 seconds then start it up and hold Command and S keys, to get you into the single-user mode.)

You then need to type the following commands:

  1. /sbin/fsck -fy
  2. /sbin/mount -uw /
  3. rm -f /Library/Preferences/com.apple.loginwindow.plist
  4. rm -f /var/db/.AppleUpgrade
  5. reboot

You will have to press the Enter/Return key after each one. The fifth command restarts your Mac. It will show the login screen. That's normal, even if you previously bypassed it. Type in your password ***** let me know after.

Customer: replied 1 month ago.
No, I found out what the problem was. The internal components were compromised by exposure to water.
thank you however.
Expert:  Mike replied 1 month ago.

Ok If you are satisfied, please kindly provide an OK or Above Rating - so I get paid. Keep in mind you can always come back to this page at any time regarding this question for no extra charge. Thanks!!