TI-66 display issue

[CarlGundel]

(08-16-2019 05:31 PM)jebem Wrote:  It looks like a LCD issue.
If you are lucky, this can be a connection issue between the main board and the LCD assembly, and it should be easily to fix by cleaning the connection pads with some electronics contacts dry cleaner or just apply a drop of IPA.

Batteries can leak inside as well and corrosion may occur.
In this case deeper cleaning with some acid solution (I use kitchen vinegar) may help.

If the issue is the LCD itself, then applying hot air from a air drier for around 5 minutes may fix the missing segments.

Here some details on the inside.
https://www.hpmuseum.org/forum/thread-28...ight=Ti-66

Thanks for the reply. I know the photo shows only some missing segments, but sometimes segments turn on which should not. In addition as I said in my original post, pressing = repeatedly will often flip the state of the segments and even cause the display to work correctly, and then not work correctly.

I will take your advice and have a look inside to see if there is any corrosion.

-Carl