I've had my 15" MBP for just over a month, it was a refurb purchased direct from Apple. I've noticed the video issue where the top 1/2 of the screen would flash, blink. It's happened maybe 3 or 4 times. It seems to only happen after it wakes from sleep and the only fix is to reboot. I know i can switch the video card over and from what i read, it solves the issue. Here's my question, since I can't get it to do it on demand, ( i did however record a video actually 2 on 2 separate occasions) should i take it in for repair now? will the problem get worse? or should i wait it out for bit in case something else goes wrong down the road??