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iMac screen goes black, but system runs fine in background

Just started happening, and repeating more an more. Screen goes black (as if in power save mode), however system continues to run in background. To test this, I carried on typing and email, when I used the power button to put to sleep, then again to wake, all typing is there. This proves it is only the display going off. Any idea what is going on here - I've viewed old discussions, and others have similar issues but no solutions out there!

iMac, OS X Mavericks (10.9)

Posted on Nov 18, 2013 5:52 AM

150 replies

rob80b

Level 1

9 points

Dec 12, 2016 1:13 PM in response to cyrano7

Definitely a problem on the 27, mine was the left side.....thankfully I had my screen replaced under apple care but I believe the screen going to sleep or turning off is another issue entirely.

Did you happen to have long periods without the problem recurring thinking it was solved only to have it return later, mine has now been stable for a few weeks so hopefully not.

cyrano7

Level 1

16 points

Dec 12, 2016 1:26 PM in response to rob80b

Hi. It always came back. Toward the end I always had an external 8-inch fan pointed at the back of my 27. (Now with my new 27, I have an external fan, just to be on the safe side.)

But I fear that years of running on the warm end of the spectrum took their toll. I suggest that at the next hint of trouble, give it to someone you dislike. (humour). The trouble always came back.