Hello Old Friend

[Gerson W. Barbosa]

(04-13-2017 04:39 PM)striegel Wrote:  

(07-08-2014 08:35 PM)DavidM Wrote:  ... the display, which has a discolored area in the lower left quadrant of the screen. Close inspection showed that the area of concern was not on the surface, but rather embedded in the screen itself. Not a good sign:

...

That is a leak of the liquid crystal, possibly due to freezing or a direct impact. I actually got to witness this effect as it grew and spread over time in the display of an HP 200LX palmtop. There is an animated gif (link below) of the process recorded over 9 days through a USB microscope at about 10x magnification.

http://www.striegels.com/alan/HPLX/200lx_screen/LCD_leak_growth.gif

My second HP-48GX and my HP-200LX are unusable due to dark spots. I had already replaced the screen of the latter because of the same reason.