Why does my MBP 13" 2012 screen shuts down by itself?

Question

The screen of my MBP 13" shuts down by itself, more and more often. It does not happen in a specific situation, and the laptop continues running and receiving inputs. In order to reactivate the screen I have to open and close it several times, or press the power button.
The screen turns completely back and the led outside start blinking like when I close the laptop.
The MBP is new, bought in summer 2012 and does not have any other program installed than the standard ones. I have no idea why this happens but it is occurring more and more.
Do you have any idea?

Answer 1

You are still under warranty.  Call Apple Care. Make sure you get a case number as all repairs have an additional 90 days of warranty. 
#1 - You have 14 days from the date of purchase to return your computer with no questions asked.
#2 - You have 90 days of FREE phone tech support.
#3 - You have the standard one year Apple warranty.
#4 - If you've purchased an AppleCare Protection Plan, your warranty last for 3 years.   You can obtain AppleCare anytime up to the first year of the purchase of your computer.
Take FULL advantage of your warranty.  Posting on a message board should be done as a last resort and if you are out of warranty or Apple Care has expired.