[Duo2400] Re: Duo 280 darkening screens

[Tom and Lisa P]

>Mad Dog wrote:
>>I think the corners are getting "stuck" and not relaxing back into
>>transparency.  I dont recal seeing old images.  My next wild guess is
>>to replace several capacitors on the LCD power board and see if that
>>works.
>
>I know it ain't the backlight, and I seriously doubt it's the power
>board's electronics. Based on everything I've read about this so far, the
>best explanation was the edges of the screen somehow become porous or
>'leak', allowing in water and/or oxygen which degrade the crystal. One
>reaason I suppose to take seriously the admonition to not spritz an LCD
>screen with a spray of glass cleaner.
>
>If it helps any, you're correct in that most TFT screens are normally
>white (clear) and darken only when energy is applied.
>
>I wonder if resealing the edges would help at all? I'd imagine completely
>'dehumidifing' it first though would be a good idea, perhaps in a vacuum
>chamber or something. No, I don't have a vacuum chamber, I'm just
>thinking here! :-)
>
>I think the only way to settle this for good is to locate an LCD
>expert(s) and ask them. A little Googling ought to turn up some of the
>big names in the world of LCD research and expertise.
>
>Dan K

Well, if its water and air, its probably permanent.  Nuts.  I would 
really like to whip a couple of these screens into shape.

Mad Dog