My MacBook 15 "display only the grey bg

I use 15 "MacBook, OS X Lion mountain.

My MacBook has n weird screen that I forced shut down eventually.

Then, I started later than my MacBook had a start of his "gift", grey of background with the Apple logo in the Center. But after 1, 2... mins, the Apple logo was gone and left the gray background and couldn't come to my office...

Answers and suggestions will be most appreciated!

Reinstall OS X without erasing the drive

Do not forget to backup before.

  1. Restart the computer and after the chime hold down the command and R until the Utility Menu appears.
  2. Choose disk utility from the Utility Menu and click on the continue button.
  3. Disk utility charges and select layouts withdrawal (usually Macintosh HD) the list entry side.  Click the first aid tab, and then click the repair disk button. If disk utility reports any errors that have been corrected, then again run repair disc until no errors are reported. If no errors are reported, click repair permissions .
  4. Once the process is complete, quit disk utility and re-enter the Utility Menu.
  5. Select reinstall OS X and click on the continue button.

Tags: Notebooks

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