Hey guys, so this one is a little bit of a puzzler: I gave my sister this shiny 1.33Ghz G4 17" PowerBook a few months ago and everything was great. Then after a few weeks the screen began to get vertical lines on it. But it would be like that for a few minutes, then the screen would be fine. Fast forward to now where the screen sometimes does not show anything at all, or is completely filled with vertical lines. An external display works like a charm and the internal screen works if I hit it like a Nintendo near the speakers. What do you think is up? Bad display? Or connector?