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  1. #1
    only the fans run when I power up
    Robbwhite24's Avatar
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    Aug 02, 2009
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    only the fans run when I power up
    I have a g4 powerpc 1.5gb ram, and 1ghz processor. I've tried taking off the hardware upgrades but still only the fans run when I power up, I think its a motherboard issue. Help please.
    if I have to buy a new motherboard I would like to get one compatable with 4gb of ram and 4ghz processor and leopard, is this possible to accomplish, or worth it?
    Note: with a 128gb hd with lots of expensive programs that I'd like to keep. Thank u.

  2. #2
    only the fans run when I power up
    louishen's Avatar
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    Oct 22, 2007
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    Specs:
    Mac Mini Core i7 2012 | White 2009 MacBook 2 Ghz | 733 Mhz G4 Quicksilver
    what happens?

    Does the front power button light come on then fade away
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  3. #3
    only the fans run when I power up
    Zoolook's Avatar
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    Specs:
    15" MacBook Pro, i7 2.66Ghz, 8GB RAM, 512GB SSD; iPad 3, iPhone 5
    You may be able to get a replacement processor or mainboard, but the kind of specs you're talking about are not possible on a G4.

    You could try and have it repaired, or buy another used PowerMac as it would be fairly straight forward to pull back the data from your hard drive when you get your replacement machine.
    In the land of the blind, the one-eyed man is stoned to death.
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  4. #4
    only the fans run when I power up
    Robbwhite24's Avatar
    Member Since
    Aug 02, 2009
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    When i press the power button the light fades away

  5. #5
    only the fans run when I power up
    Robbwhite24's Avatar
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    Aug 02, 2009
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    Sounds like my g4..lol thanks Zoolook

  6. #6
    only the fans run when I power up
    louishen's Avatar
    Member Since
    Oct 22, 2007
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    Specs:
    Mac Mini Core i7 2012 | White 2009 MacBook 2 Ghz | 733 Mhz G4 Quicksilver
    before you start replacing motherboards, try replacing the battery first, that cheap part brought my G4 back to life and it is still going strong

    3.6v Newer Technology Lithium 1/2 AA PRAM Com... (3.6VPRAM) at OWC
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  7. #7
    only the fans run when I power up
    vansmith's Avatar
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    Oct 19, 2008
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    Specs:
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    Quote Originally Posted by Robbwhite24 View Post
    When i press the power button the light fades away
    Perhaps this Apple Discussions thread will be of some help to you.

    EDIT: If you wish, you can read this Apple KB article about resetting the CUDA as well.
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  8. #8
    only the fans run when I power up
    Robbwhite24's Avatar
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    Aug 02, 2009
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    Ok what does the battery do exactly?

  9. #9
    only the fans run when I power up
    harryb2448's Avatar
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    Nov 28, 2007
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    Nambucca Heads Australia
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    Specs:
    iMac i5 2.7GHz, 16GB memory, OS 10.10.5
    This description of the role of the PRAM battery is for a PowerBook but very much the same thing for your G4. it is critical, particularly if you have a MDD which will not boot with a faulty/dead battery:-

    922-5205 (Clock PRAM) Battery For PB G4/DVI 667/800/867-1Ghz DVI, Apple Mac and iPod Accessories

  10. #10
    only the fans run when I power up
    Robbwhite24's Avatar
    Member Since
    Aug 02, 2009
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    Thanks for your help but changing the battery didn't. I heard next thing to test is the power supply or motherboard.

  11. #11
    only the fans run when I power up
    Robbwhite24's Avatar
    Member Since
    Aug 02, 2009
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    8
    Quote Originally Posted by vansmith View Post
    Perhaps this Apple Discussions thread will be of some help to you.

    EDIT: If you wish, you can read this Apple KB article about resetting the CUDA as well.
    Thanks but that didn't work either.

  12. #12
    only the fans run when I power up
    Robbwhite24's Avatar
    Member Since
    Aug 02, 2009
    Posts
    8
    is there an easy way of knowing if its your motherboard that has gone bad or your power supply?

  13. #13
    only the fans run when I power up
    Mac SK's Avatar
    Member Since
    Oct 20, 2006
    Posts
    1,513
    Disconnect the hard drive and see if it boots to the fashing ?

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