Starts up then goes black

When I turn on my Macbook Pro it starts, shows the apple begins to load then shuts off, screen goes black. Help?!?

Hello Lucinda49090,
It sounds like you are not able to successfully boot your MacBook Pro. I understand how frustrating that can be. I recommend this troubleshooting from the article named:
Troubleshooting: My computer won't turn on
http://support.apple.com/kb/TS1367?viewlocale=en_US
If your computer won't turn on, try each of these steps:
Verify you have a good connection from your Mac to the wall outlet by confirming the power cord and adapter if present are securely connected and plugged in. To check if the wall outlet is working, plug in a lamp or other electrical device.
If the wall outlet is working and you continue to have no power try another power cord or adapter if available. If it works you may need a replacement cord or adapter.
Note: See Apple Portables: Troubleshooting MagSafe adapters for further troubleshooting with MagSafe adapters.
Disconnect all accessories that are plugged in to the computer, such as a printer, hub, or other mobile device.
If your Mac supports user-installable memory, solid state drive, or hard drive, and you recently installed any of these, make sure they are installed correctly and are compatible with your computer. If possible, reinstall the original memory or drive into the computer to find out if the behavior persists afterwards.
MacBook Pro: How to remove or install memory
MacBook: How to remove or install memory
Mac Pro: How to remove or install memory
Mac mini: How to remove or install memory
iMac (27-inch, Late 2012): Installing or replacing memory
iMac: How to remove or install memory
Reset the SMC.
If you are still unable to start up your computer after trying each of these steps, visit an Apple Store or Apple Authorized Service Provider (AASP) for further diagnosis. If you plan to visit an Apple Retail Store, make a reservation at the Genius Bar using http://www.apple.com/retail/geniusbar/ (available in some countries only).Note: Diagnostic fees may apply for issues not covered under warranty or the AppleCare Protection Plan (APP).
You could also try booting to the recovery partition and repairing the disk with the Disk Utility to see if that might help as well:
Disk Utility 12.x: Repair a disk
http://support.apple.com/kb/PH5836?viewlocale=en_US
Thank you for using Apple Support Communities.
Regards,
Sterling

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Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand you are having issues with your computer not starting correctly. I would encourage you to post which operating system you are using. And whether your operating system is 32-bit or 64-bit as with this we can provide you with accurate information.
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Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
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