I just noticed my screen flickering at startup and displaying odd bluish patterns all over my screen. The first screenshot shows my desktop with a flickering tree circle like pattern and the second shows bluish grid lines appearing on the macrumors home page. Does anyone have any clue what this might be? WHen I switch from the Nvidia graphics card to the Intel, the grid lines on some faint grey areas disappear, but everything else including the desktop issues remain. Thanks in advance.
P.S. I have included a third picture that shows blue bars near the top and bottom of the screen that I am looking at as I type this.
P.S. I have included a third picture that shows blue bars near the top and bottom of the screen that I am looking at as I type this.