White screen after apple logo

Hello
i have big problem with my MacBook Pro 15 (2011)
when i start up my macbook after apple logo show White screen , and i'm trying start up with safe mode but still white screen
i'm try every solutions in site
This I’ve done so far:
1) I started in safe boot (holding shift) but that only takes my to Darwin/BSD logon screen. It asks for at username, but I can’t type in the following password.
2) I tried single-user-mode. I did “fsck” and it told me “everything appears to be ok”. Also tried: mount -uw / etc and that didn’t do it either.
3) Tried to boot from MacOS CD installer. but Still blue screen
4) I did the “option+command+r+p” – nothing.
Please help me to solve my problem
Regards,

Reinstall Lion, Mountain Lion, or Mavericks without erasing drive
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair
When the recovery menu appears select Disk Utility. 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 then click on the Repair Permissions button. When the process is completed, then quit DU and return to the main menu.
Reinstall Lion, Mountain Lion, or Mavericks
OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
OS X Lion- Reinstall Mac OS X
Note: You will need an active Internet connection. I suggest using Ethernet
if possible because it is three times faster than wireless.

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http://support.apple.com/kb/PH6606
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Intel-based iMac - Contact Support - Apple Support
http://www.apple.com/support/imac/intel/contact/
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