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I am not sure but it might happened after the High Sierra update. What i have done to resolve the issue is

  1. reset the SMC
  2. reset the NVRAM
  3. I have upgraded to Mojave
  4. i have erased the disk and reinstalled the OSX

None of them provided permanent solutions.

Now the OSX is 10.13.6 after the reinstall and revert from time machine.

I have tried on safe mode. Although, the symptomes are different, the screen is still flickering and going black.

On the external screen, there is no problem. 

The issue doesn't occur while i am watching a video (on Youtube, Netflix).

Do you have a solution for that?

MoonHorse
  • 121

0 Answers0