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From: woodhams@phoenix.Princeton.EDU (Michael Woodhams)
Newsgroups: comp.sys.handhelds
Subject: HP21, HP25 repairs
Message-ID: <9361@idunno.Princeton.EDU>
Date: 10 May 91 02:10:19 GMT
Sender: news@idunno.Princeton.EDU
Organization: Princeton University Observatory
Lines: 18


I have an HP21 and an HP25 which do not work (part of a collection of
old HP's.) The reason for the HP21 not working would seem to be a
battery pack that has leaked, as it was covered in white crystals.
I suspect the crystals have permeated the entire calculator, as the
"4" key will not depress, presumably due to being jammed by xtals. 
I am considering soaking the calculator in water and rinsing it a few
times, letting it dry thoroughly and then seeing if it works, but this
seems a very extreme method. (I've already checked that the xtals are
water-soluble.) Does anyone know how to open up these calculators?
Does anyone have a less drastic solution? (pun unintentional, but
appreciated.) Does anyone have any old HP's they want to sell me?

Michael W.

P.S. Useful note to other HP collectors out there: Whenever you post
to a newsgroup, put in a P.S. asking if anyone has old HPs they want
to sell you. This has been successful enough for me that I am