My macbook pro retina keyboard is not working, what can i do? (It's with the keyboard lights off, but the screen stills normal)

People i really need help whit my macbook pro with retina display, i started to use it normally, but when i logged into facebook it stopped working, like, the lights of the keyboard turned off, and got no answer from it, like everything stopped, just the screen keep the same, can someone please help me?
Thanks.  

Try restarting your MBP. Use the mouse, go to Apple menu (top-left) and select Restart.

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