Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!samsung!think.com!snorkelwacker.mit.edu!stanford.edu!neon.Stanford.EDU!kaufman
From: kaufman@neon.Stanford.EDU (Marc T. Kaufman)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Apple 13" RGB Won't Turn On and Stay On
Message-ID: <1991Mar29.032007.18475@neon.Stanford.EDU>
Date: 29 Mar 91 03:20:07 GMT
References: <1991Mar23.224435.4972@ux1.cso.uiuc.edu> <1271@duteca4.UUCP>
Organization: Computer Science Department, Stanford University, Ca , USA
Lines: 29

In article <1271@duteca4.UUCP> thomas@duteca (Thomas Okken) writes:
>From article <1991Mar23.224435.4972@ux1.cso.uiuc.edu>, by balg0514@uxa.cso.uiuc.edu (Brian Allen Levine):
.> The other day I went to turn on my Mac II system like I've done hundreds
.> of other times.  This time, however, the monitor wouldn't turn on and
.> stay on.  More specifically, everything powered up and stayed up except
.> for the monitor.  The monitor's power-on light lit for a moment, and
.> then went dead.  Nothing ever appeared on the monitor itself.  
 
-I've been having the same problem. There has been a lot of discussion in the
-past in this newsgroup on Apple 13" monitor problems, but I doubt whether this
-is the same problem (the other problem was monitors spontaneously switching
-off *after some use*, this problem is monitors refusing to switch on).
-The problem is intermittent; sometimes I'm OK for weeks, sometimes it happens
-twice a week (which is as bad as it gets; not bad enough for a service guy
-to wait for, I'm afraid).
-When the problem occurs, you can hear the relay inside the monitor clicking on
-and immediately off again. Normally, it clicks off after a few seconds, when
-the picture has come on.
-Turning the monitor off (with the switch on the back) and back on a few minutes
-later usually does the trick, but not always, and it is *very* annoying.

Sorry for the long include, but the symptoms are indicative.  I had the same
problem with my SONY CDP-1302, which is basically the same guts as the Apple
monitor.  The problem was: The high voltage multiplier "stick" was failing
(probably a bad capacitor).  Replacing the multiplier fixed it.  The problem
started as shutdown only on a cold start, then after a few hours, then after
half an hour, then instantly on every start.

Marc Kaufman (kaufman@Neon.stanford.edu)