I had the issue with a Sony Trinitron monitor; it's a special
antiresonance wire that is placed by the manufacturer just behind the
screen. It's intended to be thin enough that most folks won't notice
it unless they're eagle eyed like you. :-)
SWB
On 8/3/06, Bob Foxworth <rfoxwor1@tampabay.rr.com> wrote:
> >
> > I have a weird one for you here! When I first got my 21" monitor,
> I
> > noticed a couple of dark lines that ran across it, East to West, in
> one
> > row of pixels each. At the time, I was running an ATI card and had
> > assumed that it was some kind of flaw with either the card or the
> > monitor. I felt like I could live with it given the price of the
> > components. Since then, I've been using that same monitor, joined
> with
> > another 21" monitor and a new NVidia card. Just now, I happened to
> > notice that those two lines that I had long since tuned out, are
> > spanning both monitors. That kind of blows out the idea of the card
> > since I'm using a different video card now, and that eliminates the
> idea
> > of the monitor since it's on two now. I am at a loss as to what it
> > could possibly be. Any ideas? Thanks!
> >
> > --Michael
>
>
> I am assuming that the line appears only with a raster on the
> screen (i.e. powered on) and is not visible when the monitor
> is off. Then, when you say the line is "one pixel (wide)", does
> that mean that the edge of the line is sharply defined, or does
> it have some shadowing around the edge? A comment, later
> (Eben?) thought it was due to a stabilizing wire. This would
> imply that the line is mechanically produced and is some sort of
> shadowing artifact. If so it would have an edge that may not
> align exactly to the phosphor dots. If it is electronically
> produced, then I would think the edge of the line would
> align closely with the phosphor dots (assuming the scan lines
> are correct).
>
> This is an interesting forensic type question. You might
> want to use a jeweler's loupe to study the exact nature
> of the line. So far it seems it could be due to either cause.
>
> You could try one of those diag programs that make the
> screen show solid colors and see if the appearance of the
> line is color-dependent.
>
> I'd love to hear whatever you discover.
>
> - Bob
>
>
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