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Model A1297 Unibody: Early 2009, Mid 2009, Mid 2010, Early 2011 & Late 2011

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computer keeps rebooting and I sometimes get 1/2 inch vertical stripes

I also get some flickering of the display

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Ouch! This is a symptom of a dead discreet GPU.

Carefully disconnect your battery following this guide MacBook Pro 17" Unibody Battery Replacement to Step 3. Now press the power button with nothing plugged in for a good 15 secs.

Now plug in your battery again and your MagSafe charger, restart your system but press the T key that will force the system into Target Disk Mode.

You should now see the FireWire Icon on your screen do you? The system should be stable in this condition.

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Roy Innella crwdns2934231:0crwdne2934231:0
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