From owner-freebsd-hardware Mon Sep 22 16:04:14 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id QAA28341 for hardware-outgoing; Mon, 22 Sep 1997 16:04:14 -0700 (PDT) Received: from bmccane.uit.net (bmccane.uit.net [209.83.205.48]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id QAA28307 for ; Mon, 22 Sep 1997 16:03:57 -0700 (PDT) Received: (from root@localhost) by bmccane.uit.net (8.8.7/8.8.5) id SAA10054; Mon, 22 Sep 1997 18:03:17 -0500 (CDT) Date: Mon, 22 Sep 1997 18:03:16 -0500 (CDT) From: Wm Brian McCane To: Chuck Robey cc: Mark Mayo , freebsd-hardware@FreeBSD.ORG Subject: Re: My monitor's got the Shakes... In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hardware@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk On Sun, 21 Sep 1997, Chuck Robey wrote: > On Sun, 21 Sep 1997, Mark Mayo wrote: > > > Hi all... well a bad couple of weeks on my hardware seems to be > > getting worse. Suddently, my monitor is "shaking". Basically, every > > 10 minutes or so (not regular) a small, rapid shaking happens. A > > slight brightness fade-in, fade-out sort of happens at the same time. > > The picture would appear to be moving straight up and down (by a > > really small amount, but enough to be REALLY damned annoying). > > > > Any idea what the cause could be?? > > > > This monitor has already developed a pretty serious case of ghosting, > > so I fear that this fit of shaking is my signal that "she's gonna blow!". > > > > It's a 17" MAG, about 3.5 years old I believe. Been a faithful monitor, > > but it's been going downhill at a break-neck speed the last 6 monhts or > > so. > > Oh, lovely. I'm reading this on a 3.5 year old 17" MAG. > > It sounds like arcing somewhere in the HV section. Can you literally hear > it? > > As the capacitors get older, sometimes they go bad. If you're lucky, > that's it. If you're not, it could be something expensive, like a > transformer arcing. Affecting multiple sections also makes it sound like > the power. > > One other thing to watch for ... MAGs can't stand overheating. You don't > have some printouts laying on the top of the monitor, do you? I have seen this in the past on some "magitronic" and Mitsubishi diamond monitors. In both cases it was a transistor (Power-FET?) on the board. I looked for the burned out tranny and replaced it on the 'magitronics'. A similar problem also caused them to get darker and darker..... brian