Squeaking and creaking HP 28C

[Maximilian Hohmann]

Hello!

I don't know... I rather let mine squeak as I think it is part of the original design and the special (or only) charm that these calculators have to offer :-) An LED calculator has to glow in the dark an an HP "clamshell" calculator has to squeak.

And also the connecting cables between the two keyboards go through those hinges. If on a hot day that lubricant gets really liquid and finds it's way along the cables and into the connectors then the calculator might not only not squeak but also not work any more.

Regards
Max