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iMac Black Screen/Sleep Mode

Hello.

First of all i already tried every solution that showed up  while googling for answers: PRAM and SMC reset, Safe Mode and every other tip that worked for others.

My problem is that my screen will turn black, but not a black color, the screen actually turns off while the computer is still working and to get it to show an image again i have to click the mouse or press any key a few times, it's just like waking up from Sleep Mode. The issue will be triggered by watching videos on the internet. YouTube almost never triggers this behavior but sites like Dailymotion will. Im pretty sure the issue happens when playing videos. Do you think Safari (11.0) is causing this issues?.

And after "waking up" and keep watching the video, the black screen will happen again and again, and will only stop after closing Safari or the tab with the video. I thought it was a heat issue so i downloaded MacsFan Control with a maximum RPM to see it that did anything but no.

macOS Sierra 10.12.6 on iMac retina late 2014

最后更新：2017-09-22 02:34:12

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