No picture at boot

Hello! There is a problem ..
I bought a Mac Mini in 2011 [OS X 10.7.4], the monitor I have hooked up via VGA so Thunderbolt> VGA. All is well, but just can not see the boot screen. Power on the monitor blinks while the Mac is loaded, and when it loaded the desktop - the image appears. In what may be the problem? Thank you!

"Try Disk Utility
1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu at the top of the screen. (In Mac OS X 10.4 or later, you must select your language first.)
Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.
3. Click the First Aid tab.
4. Select your Mac OS X volume.
5. Click Repair. Disk Utility checks and repairs the disk."
http://docs.info.apple.com/article.html?artnum=106214
Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.
(Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)
If 10.7 or more, reboot holding CMD+r down to boot from the Restore Partition, use Disk Utility there.

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    nvidia-settings: X configuration file generated by nvidia-settings
    # nvidia-settings: version 334.21 (buildmeister@swio-display-x64-rhel04-13) Thu Feb 27 14:33:33 PST 2014
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    BoardName "GeForce GTX 660"
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    Section "Screen"
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    Option "MultiGPU" "Off"
    Option "BaseMosaic" "off"
    SubSection "Display"
    Depth 24
    EndSubSection
    EndSection
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    Last edited by firekage (2014-03-09 00:54:45)

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    Did someone help you today? Press the star on the left to thank them with a Kudo!
    If you find a post helpful and it answers your question, please mark it as an "Accepted Solution"! This will help the rest of the Community with similar issues identify the verified solution and benefit from it.
    Follow @LenovoForums on Twitter!

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