Seeing if anyone has experienced this and solved it. I have a MDD first gen 867MHZ powermac. Few days ago, it refuses to power on at all. No lights, so sounds, nothing. The only way to boot it is to unplug it and then plug it back in, until next shutdown. Ive replaced the battery, reset the pmu, reset the pram. No go. Ive run out of ideas and need help. I just hope my PMU circuitry is not messed up.