HP-48GX key stiffness

[anyfoo]

(03-28-2021 07:48 AM)franz.b Wrote:  I have opened and repaired a 27s that has the keyboard made in the same way, and it is repairable.
https://www.hpmuseum.org/forum/thread-16265.html

Thanks. I had since already completely taken it apart and also noticed that it would be repairable. The leaking battery corroded the conductive ink on the sheet of paper that provides the key contact circuits, and it seems feasible to maybe even just redraw it using conductive ink.

So I think I could put it back together eventually, but since I have a working HP-48GX already I'm not super motivated (maybe to resell it cheaply to someone who wants a HP-48S without paying the usual premium prices). Right now the board+display sits otherwise fully functional on my desk, after I cleaned the corrosion off and soldered a cable to the keyboard contacts to "remote control" it. I think it makes for a good hardware test bed when I e.g. build my own RAM card (being an 48S it has no slots but the contacts for it).