hi all! in the last week i've been watching some awkward behavior from my powerbook g4 lcd screen. when i move the screen (rotate to close or open) the screen flicks. white horizontal pixel strips emerge on my screen, in a fractions of seconds. seems like a malfunction . i've never dropped my powerbook, so it could not be jammed by a fall. this started to happen with no reason that i could understand. my powerbook has 1 and half years. anyone with the same prob? i could use some help here.... i thought this could be a temporary problem but it has passed almost a week! thks for the help!