My MacBook Pro will not start up and has a black screen

ON start up I get the start up chimes and a black screen. The keyboard lights up. It is a 15 inch, 2013 laptop running the latest Yosemite OS. I have tried holding down various keys like shift, space bar, option with no fix. I have unplugged all external devices. Any ideas? Thanks, Mark

This didn't help. I was restarting about 16 times and the screen came alive and it worked for several days. I was editing photos in aperture (last time I was watching a video on Facebook ) and the screen froze. After several minutes I forced a hard restart and the screen is again black. I tried multiple restarts,unplugged all the hard drives, tried multiple restarts, tried resetting pram and smc with no return of the screen. On a restart the chime occurs like a normal start but the screen is black. The keyboard lights up, and it acts like the start up screen is waiting for an input but I can't get it to take my password

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Have you tried booting with the install disc that came with your computer?
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If you are running Snow Leopard:
Reinstall OS X without erasing the drive
1. Repair the Hard Drive and Permissions
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and it is offered on ebay for around 10Euro for 15cc here
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Run the Startup Manager to select Startup disk: http://support.apple.com/kb/HT1310
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Click on the icon indented below, usually called “Macintosh HD” and Verify Disk. If it finishes with a green “OK” message then all is well with the disk. If it shows errors in red then you have found a problem to address once the system is backed up. Do not attempt software repairs until you have secured the data.
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If running 10.7 or later hold down Command-R at Startup.
This should invoke recovery Mode.
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If errors, run again until it comes clean or gets stuck.
Report any error messages.

My MacBook Pro will not start up after entering correct password.

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Hi MJTOOTS,
Since you are getting to the login screen, it is booting past the "gray screen" phase, so try the steps in this article, like a Safe Boot.
Resolve startup issues and perform disk maintenance with Disk Utility and fsck
http://support.apple.com/kb/ts1417
You may also want to see if any of your Login Items are causing an issue.
OS X Mavericks: Open items automatically when you log in
http://support.apple.com/kb/PH14173
Thank you for visiting Apple Support Communities.
Nubz

After instaling the update for OS yesterday (saturday 7.10.2012) my macbook pro will not start. The instaling proses start but stopp after 2-3 minutes. I have started mayby 10 tims know but it stops every time. Help, its just a monts ago my iMac hard fail

After instaling the update for OS yesterday (saturday 7.10.2012) my macbook pro will not start. The instaling proses start but stopp after 2-3 minutes. I have started mayby 10 tims know but it stops every time. Help, its just a monts ago my iMac hard fail

Actually it sometimes gets a little further, the display will dim and the pointer will appear and then whoop it will turn off. if i do a verbose start up, it will finish all the steps, the white screen will appear and dim and then it will turn off.

MacBook pro, will not start up- drive begins

MacBook pro, will not start up- drive begins?

OK, then try this:
Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
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My MacBook Pro will not start up - it was just on last night - what do I do?

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Try a SMC reset.
http://support.apple.com/en-us/HT201295
Do you get anywhere in the startup sequence?
Ciao.

My MacBook Pro will not start up and has a black screen

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