End of 2015 iMac 27 inches 5K screen lights up when the "sleep mode"

When the iMac is in "standby", sometimes the display lights for a while and then turns back off the coast. Screen does not completely, simply turn the backlight (it's like when you see a black image with the high brightness level).

I know the iMac turns once in while when the "sleep mode" to access the internet and such things, but I don't like the screen turn on like that.

Is there a question?

Thank you for your collaboration.

Probably not a problem, but to be sure that you can post a report EtreCheckon your system. We then look for obvious problems. Please click on the link, download the application and run the report. Once you have the report, please copy and paste into your response to this post.

If you would like more information on what is EtreCheck, just click on the link and you will find a description of the application.

Tags: Mac

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