When the MDD is totally dead, it usually means that the power supply has died. My MDD suffered the same fate as yours with no light on the power button. I had good luck with a rebuilt power supply from Ebay seller baltimora2000, which brought my MDD back to life. baltimora2000 also bought my dead power supply to fix and resell. Hope this helps, Bruce R. Nakamura On Sep 15, 2010, at 2:39 AM, kanegrfx at earthlink.net wrote: > when I try to power up G4 nothing happens, no light on power button > no chime, system has power to it.was working fine, > any thoughts, Tom > _______________________________________________ > G4 mailing list > G4 at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/g4