[Tfug] LCD monitor failures

[Bexley Hall]

Hi, John,

--- On Fri, 8/15/08, John Karns <johnkarns at gmail.com> wrote:

> On 8/14/08, Bexley Hall <bexley401 at yahoo.com> wrote:
> > >From time to time, I notice "dark areas" in the
> > display.  Not "black", just "reduced brightness".
> >
> > I belive these are areas where the glass has been
> > deformed (due to mishandling by user).  Can anyone
> > confirm this?
> 
> I've yet to encounter the problem myself, but I would
> guess (and a WAG at that) that it could be dust / dirt
> contamination of a reflective plane at the back of the LCD.

<frown>  I'd find that hard to believe given how they are
built, etc.  The "damaged" areas *look* like the glass has
been deformed by something like a finger (like the display was
squeezed in that spot).

>  Or possibly dust / dirt on the backlight bulb itself.

I'll have to experiment with some of the "already damaged"
panels to see if I can reproduce the type of failure in
another spot on the screen.

> Doesn't seem likely to be due to a deformation of the
> screen surface.

I don't suggest you do this to a *good* display, *but*, if you
gently press on the display while it is active and then remove
your fingertip, you will see the same sort of "darkening"
for a brief moment.  I'll try being a bit more aggressive with
a few and see what happens...

(I'll try to send you a photo, offlist, of what a "damaged"
screen looks like)