Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!rutgers!cunixf.cc.columbia.edu!beecher
From: beecher@cunixf.cc.columbia.edu (Ben Beecher)
Newsgroups: comp.sys.mac.system
Subject: Re: IIcx PSU Problem?
Message-ID: <1990Dec8.015332.4122@cunixf.cc.columbia.edu>
Date: 8 Dec 90 01:53:32 GMT
References: <1319@ucl-cs.uucp>
Organization: Columbia University
Lines: 25

In article <1319@ucl-cs.uucp> J.Purchase@cs.ucl.ac.uk (Jan Purchase) writes:
>My IIcx has recently developed a problem which is rendering it increasingly
>unusable. I would be eternally grateful for any advice as to what the
>problem is and how to solve it.
>
>[..problem description: Mac powers itself up]
>[..was happening occasionally, now a few minutes after shutdown]
>
>Any ideas?
>Must I call the engineers in (a new PSU is 100 quid!) ?
>Cheers, Jan
>FROM : Jan Andrew Purchase          | Snail:     Room 208, PhD Lab.,
>                                    |            Computer Science Dept.,
>JANET   : J.Purchase@uk.ac.ucl.cs   |		 University College,
>ARPANET : J.Purchase@cs.ucl.ac.uk   |		 London, UK.

Your problem is likely to be in the ADB cables that connect your mouse
and keyboard to the Mac.  I purchased a bad ADB cable which had its
wires crossed and my Mac would power up as soon as the bad cable was
connected.  Replace one or both of those cables and I expect your
problem will disappear.

Ben Beecher		beecher@cunixf.cc.columbia.edu
Network Planning	212-854-7439
Columbia University