Mid 2010 Model A1278 / 2.4 or 2.66 GHz Core 2 Duo processor

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Issues with display flickering and checkering

Hi! My girlfriend has a model A1278 mbpro and was recently watching a movie on it. All of the sudden, a grid of checkers that sometimes flicker and flash different shapes appeared and take up the entire screen. Any idea as to what is causing this? I've read its most commonly a video card issue and wanted to see if anyone had any input. Also, when I boot in safe mode the problem is corrected. THANKS!!

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It does sound like the GPU is going. When the system gets hot this is what can happen.

You could try cleaning the system of dust and apply a fresh coat of thermal paste on the CPU & GPU chips. Otherwise, there is very little one can do here to fix this as you'll need a new logic board.

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Seth will be eternally grateful.
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