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Tile or Pixels During the Start Up

Update:11-30Source: network consolidation
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Macbook Pro 15inch 2007 last Oct started to exhibit some strange video behavior.  Start up is fine until the grey Apple with progress bar appears.  Then it's frozen and must be shut down via the power button.  In Safe Mode, it works fine with exception the graphics are chunky if moving a window around.  The S or verbose mode doesn't exhibit any problems either.  Start up Disk also has a working screen and runs.
Connecting the laptop in T mode to a MacPro, it shows up normally and Disk Utility doesn't report any problems.  As precaution, I formated the laptop drive and loaded fresh OS.  Regular start up mode...laptop still shows the blocky, tiles upon reaching the grey apple screen. 
The Apple support pages show there was some warranty extension, but expired 2012.  It was about the GPU being a lemon.  Anyways, if anyone else had this before or fixed it, I'm all ears!
Thanks
David

The Best Answer

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Ifd you go to /Users does your home folder still exists? If so, then go into Accouns and make a new user account with your same name, and this is very important, same short name. When you do, you will get a message that a home folder already existsd and would you like to use it, say yes and then log out and your account should be there. If there is no home folder your only option is to restore from a backup.
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