I promptly ran GFXCardStatus and set it to Discrete Only and I appear to be running fine now.īeforehand, at most I could run the laptop for less than a minute and the screen would go black and I'd be forced to shut it down. I got curious after reading your post and plugged in external monitor to force the discreet card to run and it booted up. The second replacement seemed to work but now years later I've got the vertical lines again and booting problems that I saw with the beginning stages of the other logic board graphics chip failures. During the recall period I had the logic board replaced twice. I suppose I do need to be only running on integrated to run the Mac now.
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December 2022
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