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black screen startup
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K
Screen stays black on startup
I've got an iMac 27 2017 with an i7, the 580 graphics card and an SSD of 1 TB. I've extended the RAM to 40 GB. Everything worked fine, but the last couple of days the screen stays black on startup every once in a while. The fan is running and the screen get's black-grey (as it is 'on'), but...