Screen goes dark when the computer is turned a specific way. Have to pick up the computer and move around in order to get the screen back on?

Occasionally when I turn my computer to show someone something the screen goes completely dark. Then I have to re-turn it or move it around to try and get the screen back on. Its not automatic dim because that is turned off. There doesn't seem to be any kind of pattern either. Help please!

    Reset PRAM:   http://support.apple.com/kb/PH14222
    Reset SMC.     http://support.apple.com/kb/HT3964
Choose the method for:
"Resetting SMC on portables with a battery you should not remove on your own".
   Start up in Safe Mode.
   http://support.apple.com/kb/ph14204

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