I have a 15-inch, Late 2011 MacBook Pro running on OS X 10.9.2 and the entire screen frequently flashes a light blue/grey color for approximately .2 seconds. Sometimes it seems to be happening randomly, but with other instances it happens consistently. For example, when I use the Command + F function on Google Chrome and I type something that isn't on the page, the screen flashes the light blue/grey color. There is also another problem that keep occurring with my MacBook Pro. When I pick it up and move it to a different location, the screen will shut off as if I closed the laptop. I always pick it up slowly as well. After about 10 seconds the screen will come back on and everything will resume. Any help would be appreciated, thank you in advance.