Aporte original por: Sam ,
It most likely is a GPU fault. You ''might'' be able to TEMPORARILY revive it by heating the GPU (with a heat gun or by putting the board in an oven, sort of like a reflow), but the issue will return since the problem is in the GPU itself, not in the solder balls that attach it to the board. Apple had a recall program for this very issue, but it expired last year. That being said, you might be able to get it fixed for free by taking it to an Apple Store, if the staff there are feeling particularly generous.