Path: utzoo!attcan!uunet!clyde.concordia.ca!ccu.umanitoba.ca!umcarls9
From: umcarls9@ccu.umanitoba.ca (Charles Carlson)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: Whistling VGA Card [was Monitor destruction]
Message-ID: <1990Oct26.191710.388@ccu.umanitoba.ca>
Date: 26 Oct 90 19:17:10 GMT
References: <5946@nisca.ircc.ohio-state.edu> <35131@cup.portal.com> <=SL6TCD@xds7.ferranti.com> <4577@prussian9.UUCP>
Distribution: na
Organization: University of Manitoba, Winnipeg, Canada
Lines: 21

In article <4577@prussian9.UUCP> dogar@motcid.UUCP (Haroon H. Dogar) writes:
>There is a whistling sound emanating from the case. Ordinarily with the
>other sounds coming from the power supply and diskdrive (maxtor-200),
>I would ignore this sound as just normal machinery noise.  However, I have 
>found that the frequency of this sound changes as the screen changes, and
>even as the mouse is moved from one part of the screen into another.
>

I have a NEC 3D connected to an ATI 1024 w/mouse.  When I was running
my machine with the top off for awhile, I noticed as the monitor changed
frequencies, the hard drive would vibrate differently and make different
noises.  If I put a touched the frame of the hard drive, the sound would
stop.  

I suggest you take the top off of your machine and track down the sound.
If you can stop it by putting pressure on something, then maybe there
is something you can do to stop it.

Charles