Re: Once upon a time... (edited) Message #2 Posted by Vieira, Luiz C. (Brazil) on 23 Oct 2003, 7:04 p.m., in response to message #1 by Victor Koechli
Hi;
I remember the days I was at the University (80's) when an HP29C was shown to me as having this sort of problem. I opened the keyboard and I saw the plastic domes for each key, as you mention. And the faulty key had a broken cooper trail, because in these keys, the cooper trails are slightly stretched when the key is pressed. The newer plastic dome-type keyboards have no trails, only a centered conductive island in the inner middle part of the dome.
If, at that time, I had the option to use cooper foil with conductive glue (available today) or the conductive inks, I'd try repairing the faulty key the way you mention: disassembling and applying the conductive material. And I think there are also other options.
Success!
Luiz (Brazil)
(P.S. - I'll be back... soon)
Edited: 23 Oct 2003, 10:51 p.m.
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