There are several types of PowerBook G4 Aluminum models.

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PB G4 Aluminum, 1.5 GHz ppc: bottom 2/3 screen blanks out

The bottom 2/3 of the screen blanks out until I adjust the screen on its hinges. Problem is getting progressively worse. External monitor does not have same problem, I suspect failing connection?

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Probably the cable from the logic board to the LCD is going bad since the problem changes when you move the screen. Since I don't know which 1.5 you have I can't leave a link to a specific guide. I am however leaving you a guide to help you pick out your model. Good luck. Ralph

PowerBook G4 Aluminum

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Oh well fellow - we seem to have anwered at the same time. Point for you ;-)

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You might have a failing LVDS (video signal) cable. iFixit doesn't seem to have it in stock (correct me if i'm wrong) but you can find one here.

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Darryl will be eternally grateful.
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