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Contribution d'origine par : XnriquX ,

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This looks like a faulty graphics chip on the logic board. You have 3 options to repair this:

* 1- Replace the entire logic board.

* 2- Perform a reflow on the faulty graphics chip with a heat gun. Check out this old post: [http://www.ifixit.com/Answers/View/18484/video+graphics+and+boot+issues]

* 3- What i have done that works best is to perform a BGA reballing on the graphics chip but you need specialized tools and skills with soldering to do this and can be more expensive than replacing the logic board

What I would do in your situation is attempt the reflow first to see if it works. If it doesn't then I would just replace the logic board. See this guide: [guide|895]

If you want more info on reflowing or reballing try a google search of GPU reflow diy, BGA rework.

I hope this helps, good luck!

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