Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!rpi!uupsi!sunic!news.funet.fi!assari.tut.fi!assari.tut.fi!n67786 From: n67786@assari.tut.fi (Nieminen Tero) Newsgroups: comp.sys.mac.hardware Subject: Re: Help: IIcx powers itself down Message-ID: Date: 13 Dec 90 15:26:13 GMT References: <1192@dg.dg.com> <1990Dec8.010224.14756@cunixf.cc.columbia.edu> <110870@convex.convex.com> Sender: n67786@assari.tut.fi (Nieminen Tero) Organization: Tampere Univ. of Technology, Finland. Lines: 47 In-Reply-To: woods@convex.com's message of 12 Dec 90 19:56:20 GMT In article <110870@convex.convex.com> woods@convex.com (Darrin Woods) writes: In article <1990Dec8.010224.14756@cunixf.cc.columbia.edu> beecher@cunixf.cc.columbia.edu (Ben Beecher) writes: >In article <1192@dg.dg.com> colella@emav51.webo.dg.com (Wayne Colella) writes: >>Hi, folks. I hope someone out there can help me. I have a IIcx that >>likes to power itself down. It happens a lot more frequently when I >>have an air conditioner and/or copy machine running, but lately it's >>happening even when no other power hogs are running. >> Wayne Colella colella@emav51.webo.dg.com > >I suspect your SCSI devices might be the problem. What kind of hard >disk is plugged into your SCSI port? Are you using a nice, fat cable? I had this problem once. Mine was an original cx. After having the 13" RGB plugged into the back of the mac for about 2-3 months, my mac started doing the same things that you are describing - shutting itself off. Problem - power supply was burning itself out. Apple replace these 'problem' power supplies, but the problem still remains - the internal power supply really can't handle anything more than a 12" mono monitor over a long period of time. To this day - even with a ci, I plug the 13" into the wall socket directly. i.e. this may or may not be your problem - it sounds like your power supply is going bad regardless of the reason. BTW - for those of you who didn't catch it.. The socket on the back is not a pass through - it draws its current from the mac itself just like the hard drive and floppy and moboard Huh? Passing wall otlet power though the CX power supply. No way! There might be a relay that the CX switches on when the machine is powered up and so feeds power to the monitor, but that power surely don't pass trouhg the CX power supply in any way. Check you facts. Blacksheep Senior Systems Engineer -- Darrin R. Woods woods@convex.com This is a guest account. Convex knows nothing about what I'm saying, or even that I'm saying it. -- Tero Nieminen Tampere University of Technology n67786@cc.tut.fi Tampere, Finland, Europe -- Tero Nieminen Tampere University of Technology n67786@cc.tut.fi Tampere, Finland, Europe