Now, I know my May 2001 iceBook is getting a leeeeetle long in the tooth, but in the past few weeks, its developed a new problem. I'll be going about my computing business, and the screen will randomly dim a few notches. Then it'll brighten a few notches. Then it will dim one notch. Over. And over. And over. And over again. My monitor is constatling changing its brightness levels with no input from more, and without the brightness adjustment bar/box coming up. Is this another sign that I should bite the bullet and buy a shiny new Mac?