Samsung 243t LCD Monitor - 2 Vertical Lines - Problem?

External Since: Dec 03, 2004 Posts: 1

Just purchased a 24" Samsung 243T LCD monitor. There are 2 faint
vertical lines running up and down right in the middle of the display.
I don't remember these when I initially plugged in, but noticed them a
few hours later. They are faint. You only seem to see them on darker
colors like blue and gray. I do not see them on a white background.

Is this a flaw with the monitor or it is designed this way. I thought
I remember earlier generation LCD's that had some kind of "wire" that
ran behind the display and could be seen.

I spent $1800 on this and don't want to keep it if it is a problem.

Thanks in advance.

External Since: Nov 17, 2004 Posts: 63

> Gregory <greg.wilder.TakeThisOut@insightbb.com> wrote:

> Just purchased a 24" Samsung 243T LCD monitor.
> There are 2 faint vertical lines running up and
> down right in the middle of the display.

You might create some wallpaper files, each at
full-res and of a single color, such as:
all-red.bmp
all-blue.bmp
all-green.bmp
all-black.bmp
all-white.bmp

Load each in turn as the wallpaper, with all other
stuff minimized (or use an image viewer with full-
screen mode), and see if the problem is specific to
a single color drive. If you have a jeweler's loupe,
examine the affected color triads.

With all-white.bmp engaged, you should see distinct
R-G-B triads in black boxes. If you see anything
else, it might be an artifact of how the panel was
fabricated. If you see the absence of a color primary,
suspect a defective panel (or graphics card).

To rule out the graphics card, create 640x480 subsets
of the bmps, wallpaper them, and let the monitor upscale
them to fill the screen.

> I thought I remember earlier generation LCD's
> that had some kind of "wire" that
> ran behind the display and could be seen.

Prior to the deployment of FABs that could handle full-
size LCD substrates, some early "large" LCDs might have
been tiled from smaller panels, in TV "window wall"
fashion, and these would have visible join lines.
There's no excuse for that in a contemporary LCD.

I'm no expert on this, but I don't know of any other
reason for such lines.

On aperture-grill CRTs (Trinitrons), of course, two
horizontal lines are common, representing the shadow
of the tension band wires that stablize the thousand
or so vertical grill wires.

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