IMac screen backlight problem

Hi
I have a 6 month old (late 2011) iMac 27" 2.7-i5-4MB/1TB, the screen constantly blanks with the iMac still running and the screen still with content on (can just see if I shine a torch at it).
Hot corners off - sleep set to 30 mins
I can bring the screen back if I press shift-control-eject and move/click the mouse, sometimes this lasts for 5 sec sometimes for 10 min or more.
Why is the backlight doing this, its seems there is a hardware problem that is restored (temporarily I admit) by a software action, I cant believe changing the backlight will fix this.
Does anyone have a solution or is it a case of getting it back to the mac tech's???
Thanks
Victor

Your iMac should still be under AppleCare warranty.
Sounds like intermittent backlight connection.
Bring it back to an Apple store or authorized Apple repair facility to be diagnosed and repaired.

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