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chscag

 
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Member Since: Jan 23, 2008
Location: Fort Worth, Texas
Posts: 40,067
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Mac Specs: 27" iMac i5, 3.2 GHz, iPad 3, iPhone 5c, 3 iPods, OS X Mavericks

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My Mactracker shows your machine to be a Mid 2009 15" MacBook Pro LED backlighted.

The only thing I can suggest is to go over your work again to make sure all cables are in place correctly and not being pinched off. Pay special attention to cables that plug into the logic board.

Also, when the screen goes black... use a flashlight to shine on it to see if you can make out whether there is video or not. It's possible the video is OK but the backlight is not working. Another test would be to hook an external monitor up to your MBP to see if that's working OK.

You can check your work at the ifixit web site. iFixit: The free repair manual
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