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Re: noise from monitor, HELP!

On Tue, Aug 01, 2000 at 07:07:18PM -0700, Ron Farrer wrote
> I've been running Debian for years and my monitor (20" IBM P200) has
> been working fine with it's current setting for months. Now all of a
> sudden I get a VERY high pitched noise from it when in X. It does not do
> this on the console! It has become more and more frequent and is
> starting to drive me nuts (well more then usual :) I know it's the
> monitor because I can turn it off while it's doing it and the noise
> stops. Does anyone know what the problem might be? 

If it is a regular CRT-style monitor, there are wire coils
wrapped around the CRT to deflect the electron beam to provide
horizontal & vertical deflection; these are probably glued in
place (or at least, in bundles) using epoxy resin or something

Probably, the epoxy has cracked or come loose from whatever it's
anchored to at some point and what you can hear is some or all
of the windings on the horizontal deflection coil rattling back
and forth in time to the horizontal scan, in accordance with
Newton's laws ("For every action there is an equal and opposite
reaction").  Just maybe, it's some other part of your monitor's
yoke doing the same thing.  It's irritating as hell if you can
hear it, but it shouldn't affect the monitor's performance or

Possible solutions:
  - Pay someone to fix it.  If you take it in for a service, be
    *very*clear* about the problem or it probably won't get fixed
    (chances are, most of their techs won't be able to hear it).
  - Swap monitors with someone who can't hear it;
  - Listen to a few hours of something load every day until the
    problem goes away (what most people, wittingly or not, do);
  - Get a new monitor (big bucks for something that size).

John P.
http://www.mdt.net.au/~john Debian Linux admin & support:technical services

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