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isanchez · (This post was last modified: 07-24-2019 12:26 PM by isanchez.)

Hi,

If it helps, I have solved this issue in a couple of Pioneer series calculators (Hp22s). It is caused by the silvered film behind the screen. (I do not know exactly why) It is not (in my case) caused by the display itself. Relatively easy to solve if you can dismantle the calculator and have access to the back side of the display (it is not necessary to remove it apart.. I do not recommend it).

I do not know if it can be solved in this (big) screen and HP model.

I try to find the thread in the Forum and come back.

Update: look here: https://www.hpmuseum.org/forum/thread-12652.html

Regards

Ignacio