PowerMac wont restart - USB ports deactivated

Discussion in 'Mac Basics and Help' started by BlockerKiwi, Sep 23, 2008.

  1. BlockerKiwi macrumors newbie

    Joined:
    Sep 23, 2008
    #1
    Hi, after some help....

    My G4 PowerMac QS 733 running 10.5 wont restart. My daughter says it was going when she used it, but that a message came up that the USB port which had the mouse in it was being deactivated because it was drawing too much power. I think the mouses cord was damaged. She moved the mouse around the ports, and the computer deactivated them all and then shut it self down!

    I have tried plugging in other keyboards and another mouse, but to no avail. I have unplugged everything, including power. Now the when I try to restart, the start up light on both the screen and tower just flash as if the Mac is asleep, but the Mac doesnt start up and I get no start up tone.

    Any ideas?
     
  2. hughvane macrumors 6502

    hughvane

    Joined:
    Aug 25, 2008
    Location:
    Banks Peninsula, New Zealand
    #2
    This reads to me like a serious hardware issue, possibly a motherboard failure. With no startup power, other than the brief light flash, you cannot realistically use the original install dvd/cd and run a hardware check; nor Disk Warrior. I would suggest you take the G4 to an Apple service technician who can run a series of tests on it.

    Second thought - if repair cost is going to be prohibitive, rescue the hard drive for use later, and consider a replacement computer.

    Edit: A second, second thought - what about resetting the PMU? See http://docs.info.apple.com/article.html?artnum=95037 and http://docs.info.apple.com/article.html?artnum=95035
     
  3. BlockerKiwi thread starter macrumors newbie

    Joined:
    Sep 23, 2008
    #3
    Solved

    Thanks Hugh, it worked! I reset PMU and PowerMac restarted!

    I now have a happy daughter who is studying professional photography, and her work was on there!

    Thanks again.
     
  4. hughvane macrumors 6502

    hughvane

    Joined:
    Aug 25, 2008
    Location:
    Banks Peninsula, New Zealand
    #4
    Cheers mate! Such is the inspiration of poached eggs for breakfast. :D
     
  5. Macrovertigo macrumors member

    Macrovertigo

    Joined:
    Jan 25, 2008
    Location:
    Vermont/España/etc.
    #5

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