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Powermac g4 mdd

281 Views 2 Replies Latest reply: Oct 19, 2013 9:57 PM by kaz-k RSS
Jgoaks Calculating status...
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Oct 19, 2013 7:40 PM


Hopefully someone can help me. I just acquired a powermac G4 MDD with a 22" cinema display. It's running OS9 and OS X Tiger. It has been running fine until recently when I turned it on and the power button just blinks at me. It's running but the monitor will not turn on. If I unplugg the monitor from the computer the light stops blinking. Any suggestions? Please help.

  • BDAqua Level 10 Level 10 (114,790 points)
    Currently Being Moderated
    Oct 19, 2013 9:00 PM (in response to Jgoaks)



    Can you count the beeps or flashes?


    1 beep = no RAM installed

    2 beeps = incompatible RAM types

    3 beeps = no good banks

    4 beeps = no good boot images in the boot ROM (and/or bad sys config block)

    5 beeps = processor is not usable


    In addition to the beeps, on some computers the power LED will flash a corresponding number of times plus one. The LED will repeat the sequence after approximately a 5-second pause. The tones are only played once.


    Note: In this case, a flash is considered to be 1/4 second or 250 ms or greater in length.



    Apple LCD displays: Power light flashes...


  • kaz-k Level 4 Level 4 (1,995 points)
    Currently Being Moderated
    Oct 19, 2013 9:57 PM (in response to Jgoaks)

    Power supply is a little bit weak, especially 25V output?


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