Question about Apple iMac G4 Desktop

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The screen on my Apple Powerbook G4 goes dim and sometimes out.

It doesn't have anything to do with the brightness of the screen. I thought it was my power supply. Could it be my battery is going bad? The computer is almost 4 years old and on the same battery.

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  • trieva Feb 28, 2009

    It doesn't always do it. It starts strong and all of the sudden it goes dim. When I shift the computer. When I do a restart it seems ok until it happens again.

  • trieva Feb 28, 2009

    Is it expensive? I am toying with the idea to get a new laptop.

  • trieva Feb 28, 2009

    Model Name: PowerBook G4 17"
    Model Identifier: PowerBook5,7
    Processor Name: PowerPC G4 (1.2)
    Processor Speed: 1.67 GHz
    Number Of CPUs: 1
    L2 Cache (per CPU): 512 KB
    Memory: 2 GB
    Bus Speed: 167 MHz
    Boot ROM Version: 4.9.1f3
    Serial Number: W85350QTRJ3
    Sudden Motion Sensor:
    State: Enabled
    Version: 1.0

  • trieva Feb 28, 2009

    OK. THANKS SO MUCH for all your help! Guess I'll bite the bullet and taking it into an authorized dealer to see the damage.
    Have a good evening!


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My screen was getting dim as well and very annoying -- I went into Display in System Preferences, and unclicked the 'detect ambient light' thingie, and then adjusted the brightness on that screen, as using the F10 button on the keyboard wasn't doing a thing - voila, bright display again on my getting ancient PowerBook G4  . . . I think the ambient light thingie went haywire? 

Posted on Jul 03, 2009

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How long before it goes dim?

Does it start strong, then dims right away?

Posted on Feb 28, 2009

  • 2 more comments 
  • RescueTechLA
    RescueTechLA Feb 28, 2009

    That's what I'd thought you say.

    The problem is most likely the inverter and / or the lcd backlight. Most of the time it's just the inverter.

    You'll have to have a local Apple tech fix the problem.

    I don't recommend normal users fixing Apple's themselves, they're too difficult.

  • RescueTechLA
    RescueTechLA Feb 28, 2009

    The part itself isn't it's the service that will kill ya.

    What's your exact model? I can send you a link to a guide so you can see if it's something you're willing to try.

  • RescueTechLA
    RescueTechLA Feb 28, 2009

    Nah, forget about it. I just looked at the process. It's way too complicated for a home user.

  • RescueTechLA
    RescueTechLA Feb 28, 2009

    You might want to try craigslist first, Apple will really sock it to ya!

    Here's a link to the guide just so you can see what I'm talking about.

    It gets to about the half-way mark.



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