Need some help. My Macbook (Model A1278) is having some issues. At random points it will freeze and then restart while in use. Also, anytime I close my laptop, it completely shuts down. Lastly, Horizontal lines intermittently appear on the screen grouped in Vertical columns. I took this to the Genius Bar and they couldn't find anything wrong. Mentioned that it could be the RAM. Before I replace the RAM, I wanted to see if anyone was having similar issues. Thanks so much!