Graphics problems help

Ok so I bought my pro early september before the back to school thing was over. So far it has been good and no problems. Yesterday, however, when I opened front row, the screen scrambled for a half second and then went back to normal. It hasnt done it again since. And then last night, I got the notorious vertical striping thing. Closed and reopened it and everything was fine. Now I know that this has all been discussed but I just have a few specific questions. First, was that short scramble a sign that my graphics card is dying?
and second, is the vertical striping thing because of a defective graphics card as well or is it a screen issue?

Thanks