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Q: My powermac g4 starts up and shuts down immediately after. Why?

I have a Powermac G4 (PowerPC 7455) dual 1.42 GHz, 2x120 GB hard disks, 2x150 GB hard disks, 4x500 GB Ram

I erased all disk and started to install Leopard on one of the 120 GB disk and, during the installation it freezed.

I had to force shutdown and since then it's been impossible to try the Mac Osx install again. Everytime I push the start up button, 1 second after the startup sound  it shuts down. Can anyone help me.

Posted on Apr 5, 2015 1:38 PM

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Q: My powermac g4 starts up and shuts down immediately after. Why?

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  • by BDAqua,

    BDAqua BDAqua Apr 13, 2015 10:25 AM in response to nunotuna
    Level 10 (123,670 points)
    Apr 13, 2015 10:25 AM in response to nunotuna

    OK, how is it going?

  • by nunotuna,

    nunotuna nunotuna Apr 13, 2015 6:24 PM in response to BDAqua
    Level 1 (0 points)
    Apr 13, 2015 6:24 PM in response to BDAqua

    Didn't work either...
    I'm buying a new PRAM/Motherboard battery tomorrow and check if it works like that.
    If not I'll just have to admit I don't know what's happening and take it to a Apple support store.
    We put to practice all the possible scenarios on this. Maybe it's one of those "right in front of our eyes" thing.
    Anyways. If I find anything new about it I'll post here for community sake.

     

    Thanks again for all your help BDAqua!

  • by BDAqua,

    BDAqua BDAqua Apr 13, 2015 7:05 PM in response to nunotuna
    Level 10 (123,670 points)
    Apr 13, 2015 7:05 PM in response to nunotuna

    If not I'll just have to admit I don't know what's happening and take it to a Apple support store.

    Apple themselves won't touch it, possibly an AASP.

  • by nunotuna,

    nunotuna nunotuna Apr 16, 2015 5:01 PM in response to BDAqua
    Level 1 (0 points)
    Apr 16, 2015 5:01 PM in response to BDAqua

    So. I have news.
    This tech guy borrowed me an external drive with a bootable Leopard OS which I connected to the G4 and it was immediately recognized when I powered it up pressing the Alt key.

     

    I managed to install Mac OSX 10.5.8 and finished installing all the software I needed and that I still had from back then.


    I restarted it and transferred the files with a bi-directional ethernet cable from the iMac to the G4. I finished the job and shut it down.


    Later that night I started it up again and that grey screen with the chinese/japanese/whatever characters appeared.


    I called my tech friend and he told me it might be one (or more) defective RAM modules.


    So. I'm going to try to find some PC2700 DDR 512GB RAM modules and buy them.

     

    Not finished yet!

    See you soon.

  • by BDAqua,

    BDAqua BDAqua Apr 16, 2015 5:29 PM in response to nunotuna
    Level 10 (123,670 points)
    Apr 16, 2015 5:29 PM in response to nunotuna
  • by nunotuna,

    nunotuna nunotuna May 8, 2015 6:16 PM in response to BDAqua
    Level 1 (0 points)
    May 8, 2015 6:16 PM in response to BDAqua

    So... My RAM sticks are fully functional. I Just bought the 3.6 volt lithium motherboard battery!  I've spent more than a month looking for the bloody thing. Everyone I asked about it gave me "that look"... It seems that no one knows what a motherboard battery is and the ones who know always thought that they would look like a watch battery... I know. This was a kind of reality check. I'm 45, looking for a battery for a 15 year old Mac... why the ****... keep it simple idiot!

    I guess this is a worse situation than our parents changing from a typewriter to a 286 processor...
    I bought the battery, Put it on its rightful place on the motherboard. It started it like a "real Mac". I restarted it 3, 4, 5 times and I thought... That's it! I made it. It's working. Shot it down and left home for about 4 hours and the first thing I did when I arrived home was to click on the start up button... no-thing.. I'm so ******! What the **** is happening here!?

  • by BDAqua,

    BDAqua BDAqua May 9, 2015 10:20 AM in response to nunotuna
    Level 10 (123,670 points)
    May 9, 2015 10:20 AM in response to nunotuna

    Was polarity right on the battery?

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