About 3 weeks ago, my macbook started up to vertical lines. I fixed the problem by resetting the PRAM and then going into display preferences and changing the resolution. It seemed to have fixed the problem. But last night, I shut down my macbook and rebooted. It started up to the vertical lines.
I thought the PRAM reset and changing the display settings was a permanent fix for this issue. Could this be a hardware issue with the logic board on my Macbook (week 31)?