HT201177 Why does my iMac display keep shutting off. The rest of the computer keeps running and I have to unplug it for a while to get it to come back up.

My 27" iMac's display goes to sleep after a few min, and you can still hear it running in the back ground. I can't hold the button on the back to shut it off. I have to unplug it for a while to get it to restart.

Well, at less than one year old it is under warranty (and hopefully you have Apple care too).
You should take it to your Apple Store and have it examined within the guarantee period.
The problem, may not be that serious, but that is what a warranty is for.   It is also why you should take out the insurance of Apple Care.

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