Re: HP 42S - intermittent rows nonfunctional Message #3 Posted by geoff quickfall on 1 Dec 2009, 3:49 p.m., in response to message #1 by Rob Welch
Hello Rob,
Take a look at this posting. It will show you the foam rubber keyboard to logic PCA contact failure. This is the rubber that needs replacing.
I have done 5 42S upgrades to 32 K as well as restoring about 10 other pioneer models all suffering the degraded foam problem. I use a foam mouse pad as a donor.
opening a 42S
The method I use is credited to Tony Duell and I find the easiest way to enter the calculator. Others prefer to use a credit card inserted between the shells and used to pry the shells apart.
Good luck, and it is an easy fix in the scheme of things.
Cheers, Geoff
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