screen went black on my iMac
Why did the screen go black on my iMac?
Why did the screen go black on my iMac?
Please post the context, we weren't there to witness when it went black so we need a lot more information. Information that you should include would be exactly what the computer was doing when it went black, the year and model of the iMac and what version of OS X is installed.
screen went black on my iMac