Hello Everyone, I am new to the forums but I have a question about my MacBook Pro. First of all This laptop was given to me because the screen was broken. I have since replaced the screen with a brand new one, I have also replaced the combo drive in it. Everything was working beautifully till the other day. I was installing a game and all of a sudden out of no where these jagged diagonal lines appeared. Now the system will boot and run just fine you can do whatever you want. is there anyway of getting rid of these lines?