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Thread: Semi-Dead Desktop G3

  1. #1
    Join Date
    Dec 2002
    columbia, MD USA


    I'm puzzled by a beige desktop G3 recently given to me by an old friend. I'm hoping some of you knowledgeable folks might have some ideas. It shows the following symptoms:

    Hit power button: No response what so ever
    Re-seat all memory and various circuit boards: No response
    Pull all PCI cards, CD ROM, Floppy etc.: No response
    Hit reset button on Mother Board: Power Supply fan spins up for about a second, various LEDs on the circuit boards turn on, then there is a solenoid sounding click from inside the power supply and the fan stops. No further response
    Change PRAM battery: No response

    Each time I hit the re-set button on the mother board, then try to power up, I can get the power supply fan to come on for a second and the LEDs to flash before it cuts out again.

    I'm no expert on these kinds of things, but I figure there is either something shorting out causing a circuit breaker to trip, or I've got a messed up power supply. The friend who gave this to me says that the last time he booted it up was at least a year ago. At the time the internal hard drive had died and he was booting off an external SCSI disk, but otherwise it was working fine. I had been planning on booting off an OS 9 installer CD to see what I can do about the supposedly dead drive, but I haven't gotten that far yet.

    Other stats:
    G3 300
    Media100 QX card
    ATTO SCSI card
    Macally firewire/USB card
    256 megs RAM

    Any ideas would be much appreciated.

    -Frank McIntyre

  2. #2
    Join Date
    Feb 2001
    silicon valley, usa


    I've seen a number of macs (7500, 7200. Beige G3) with dead power supply respond with a flicker of life each time the power button is pressed. I suspect you have one too.

    Don't shoot the messenger.

    [This message has been edited by ricercar (edited 08 December 2002).]

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