Thanks for the replies. I been doing some reading, and have tried resetting the PMU, and reseating things with no change. My question is: could a bad battery cause this behavior? I'll try replacing that while I look into buying a new supply; it couldn't hurt, I don't know how long it's been there. Simon Stone ------------------------------ > > Message: 3 > Date: Sun, 25 Apr 2010 13:42:36 -0500 > From: William Surritte <wsurritte at nolimittech.net> > > > Would incompatible firmware cause the Power strip breaker to trip? > The SD is powered by the computer PSU so +1 for Power supply > > On Sun, Apr 25, 2010 at 12:23 PM, WARREN TAYLOR <twobzz at myfairpoint.net > >wrote: > > > Sounds like power supply. Unless you have installed some incompatible > > firmware i would say go for power supply > > > > On Apr 25, 2010, at 12:19 PM, Simon Stone wrote: > > > > Greetings, > >> > >> my dual 1GHz MDD has been displaying some behavior lately which I > suspect > >> is power supply related, but maybe someone can confirm, or suggest other > >> possible things to look for. I have an Apple Studio Display (adc) and a > >> second HP monitor connected and am running OS 10.4.11. Recently, at boot > up, > >> as soon as both monitors click on my breaker on the power bar is tripped > >> shutting down everything. First I tried disconnecting the HP - same > thing; > >> then the SD and it was ok. I connected the SD while the MDD was on > (maybe > >> not the best thing to do?) and it worked ok. Today it got worse: the > >> computer with nothing connected will try to start breifly when I press > the > >> power button, and will shut off - if I try again immediately - nothing. > If I > >> unplug from power and plug again - power button lights up briefly and > shuts > >> down. What's happening here, is there anything I should try? Thanks. > >> > >> Simon Stone. > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://listserver.themacintoshguy.com/pipermail/g4/attachments/20100425/47af432d/attachment.htm>