Kevin, Glad to hear that you got the problem fixed. I had a different but similar problem with my MDD dual 1.25 running 10.3.8 recently. While the computer was in sleep mode a transformer nearby exploded, creating a brief power outage. When I tried to start up the computer, the start button would light as long as I held it on but would go out as soon as released with no sound whatsoever from the computer. I thought that a surge may have blown something in the start up circuit. I opened up the computer and removed the 4 hard drives and removed the pram battery to check the voltages. When I replaced the battery and hit the start button, the computer tried to start up but since there was no system available not much happened. After replacing the hard drives everything was OK and has been for a couple of weeks now. I think removing the battery for a few minutes fixed the problem. I did nothing else to reset the pram but removing the voltage for long enough must have forced a reset of something that got scrambled during the power surge. Just thought this might be of interest in case someone else had a similar problem. S. Kennedy