Help. MacbookPro9,1 w/ 840 SSD not booting after 10.9.2 update. Drive checks out fine, and works well w/ 10.9.1

Hi Everyone.
My Macbook has been running fine on 10.9.1. When I installed the update, the computer won't boot up. It stays on the apple logo. I tried Safe Mode, resetting PRAM/NRAM, Single User Mode etc., nothing.
I scanned and repaired permissions on the drive, but everytime the drive itself checks out fine. So I did a time machine restore, and everything works well (10.9.1). Figured it was just a fluke, so I attempted to update again. Same issue!
Booting in verbose mode gave me the following:
The only thing that I can think of from trying to read around in all the multiple posts is that maybe 10.9.2 doesn't like my SSD?

If you don't already have a current backup, back up all data, then reinstall the OS.* You don't need to erase the startup volume, and you won't need the backup unless something goes wrong. If the system was upgraded from an older version of OS X, you may need the Apple ID and password you used.
If you use FileVault 2, then before running the Installer you must launch Disk Utility and select the icon of the FileVault boot volume ("Macintosh HD," unless you gave it a different name.) It will be nested below another icon with the same name. Click the Unlock button in the toolbar and enter your login password when prompted. Then quit Disk Utility to be returned to the main screen.
There are ways to back up a computer that isn't fully functional. Ask if you need guidance.
If you installed the Java runtime distributed by Apple and still need it, you'll have to reinstall it. The same goes for Xcode.
*The linked support article refers to OS X 10.9 ("Mavericks"), but the procedure is the same for OS X 10.7 ("Lion") and later.

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Hello, beersaditya.
Thank you for visiting Apple Support Communities.
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I have a 27 inch imac (10,1 late 09) that was doing the same intermittently during 10.10.2. In a fit of frustration, I updated yesterday to 10.10.3 and now the computer is doing exactly as you describe. I cannot get past the white screen at all. I have booted into recovery, verified and fixed the drive even though it it checked out fine. and attempted a fresh download on a clean partition. nada... i can get into safe mode, and I tried installing the SMC fan control, switching off transparency, and lowering my resolution. none worked.
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Message was edited by: Anon87
Message was edited by: Anon87
Message was edited by: Anon87

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applesetupdone...
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