1 2 Previous Next 15 Replies Latest reply: Nov 30, 2005 3:26 PM by jefstone
Den Watts Level 1 Level 1 (0 points)
My Powermac MDD G4 is dead! You press the power button and it glows for no more than two seconds, and then fades out. No effort at starting up or anything - completely dead - any suggestions? If you suggest resetting something please explain how to - I really dont know much about these machines!

Powermac G4 MDD Dual 867, Mac OS X (10.2.x)
  • 1. Re: URGENT HELP - POWERMAC DEAD!
    AJ Level 5 Level 5 (7,065 points)
    Could be one of several different things.
    The two most likely are a bad power switch or the system needs a PMU reset.

    To reset the PMU:

    Open the case.

    Examine the motherboard for a flat button about 1/2 the size of a pencil eraser. The button is in different places on different motherboards - I don't know where it is on your particular system.

    The button is probably grey, probably near the battery, and should be mounted on a small silver square.

    Push and hold the button. (Count to 10)

    Let go of the button.

    Try to turn on the system.
  • 2. Re: URGENT HELP - POWERMAC DEAD!
    Robert Martinez Level 1 Level 1 (85 points)
    This worked on my system. MMD.

    Thank you so much. You saved me tons of time and cash I am sure with this tip.

    Best,

    Che'

    Emac 1.25   Mac OS X (10.4.3)  
  • 3. Re: URGENT HELP - POWERMAC DEAD!
    gavinpaul Level 1 Level 1 (5 points)
    Hi maybe you can help me too! PowerMac G4, the old one with OS9, 64MB Ram. Tried to upgrade the OS9, restarted, then got the folder with the question mark. Tried booting from the OS9 CD, but no luck. Any wisdom?
    Gavin
  • 4. Re: URGENT HELP - POWERMAC DEAD!
    Thomas Bryant Level 6 Level 6 (13,865 points)
    Hello! What happens when you boot while holding down the "c" key with the cd installed? Does it boot to the cd? You have to hold it down till you're sure it's booting from the cd. Tom
  • 5. Re: URGENT HELP - POWERMAC DEAD!
    gavinpaul Level 1 Level 1 (5 points)
    Hi. Holding down the C key has no effect.
  • 6. Re: URGENT HELP - POWERMAC DEAD!
    jefstone Level 1 Level 1 (0 points)
    My quicksilver dual 800 refuse4s to turn on.... power light comes on it makes all the usual noises etc hard drives fire up as well. but nothing on the monitor. it has 10.4.3 on and 1.5 gb ram.


    i have tried the pmu switch to no avail...

    the led on the logic board lights up.

    the keyboards capslock light does not.


    any suggestions?
  • 7. Re: URGENT HELP - POWERMAC DEAD!
    AJ Level 5 Level 5 (7,065 points)
    Have you verified the monitor and video card are good?

    Is all the RAM OEM, or have you added it after purchase?
    If the latter, start by removing the ram you added.

    If you have 3rd party expansion cards, remove them.

    Are the mouse/keyboard connected directly, or through a USB hub, including hubs in a monitor?

    If you have a Pro/optical mouse, does it's light come on?
    The system should boot w/o a keyboard connected.
    It's possible the keyboard or USB port is dead. Try the other port.
  • 8. Re: URGENT HELP - POWERMAC DEAD!
    jefstone Level 1 Level 1 (0 points)
    Yep I tried all that stuff, but thanks for the suggestions.

    I think either the Logic Board or the Memory module is dead as there is no light on the capslock or my mighty mouse.

    The LED on the Logicboard lights up and the hard drives spin up, likewise the monitor lights up but the screen is blank.

    So I think its off to Apple for me...
  • 9. Re: URGENT HELP - POWERMAC DEAD!
    JimT Level 2 Level 2 (315 points)
    What if you hold down the option key? Not sure about os 9, but in X it shows all mountable volumes. Tell is if this works!
  • 10. Re: URGENT HELP - POWERMAC DEAD!
    JimT Level 2 Level 2 (315 points)
    What kind of monitor is it? With the studio displays, if the video card is going, it may not put out enough power to give power to anything plugged into the ports on the back of it...

    just a thought....
  • 11. Re: URGENT HELP - POWERMAC DEAD!
    jefstone Level 1 Level 1 (0 points)
    Well I got home from work today watched 'Top Gear' and decided to try and turn on my old G4 and she decided to turn on as though nothing had happened.....

    Go figure...

    Thanks evryone for your suggestions, I tried them all and one of them must have worked, just not sure which one???


    ta guys
  • 12. Re: URGENT HELP - POWERMAC DEAD!
    gavinpaul Level 1 Level 1 (5 points)
    Tried that, but same thing happening...thanks for the help.
  • 13. Re: URGENT HELP - POWERMAC DEAD!
    jefstone Level 1 Level 1 (0 points)
    It refuses to boot again....

    It can supply power to the mighty mouse, but not the keyboard (although if you boot up and hold down the mouse button to eject a CD it will power the keyboard)

    Everything powers up Hard drives etc, but no visuals on the monitor ( a Sony CRT) although it does turn the monitors power light green.


    Any more suggestions guys?
  • 14. Re: URGENT HELP - POWERMAC DEAD!
    AJ Level 5 Level 5 (7,065 points)
    Does your Sony support multiple inputs?
    If so, have you tried using a different input port?
1 2 Previous Next