I recently purchased a tibook for cheap to run os9 so I can work on some old music files. I booted up and all seems fine until I nudge the screen, the all I see are vertical multi-colored lines on the screen, forcing a restart. It turns out that after running for a few minutes, regardless of nudging the screen, the same thing happens. I tried plugging in a vga monitor to see if it was just the screen, but the same thing happens to the external screen as well. Is it possible this is a result of a bad cord, or am I facing a more expensive problem. I don't want to throw good money after bad, but it would sure be nice if I could get this thing working. Any thoughts?