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From: jpser@cup.portal.com (John Paul Serafin)
Newsgroups: comp.sys.handhelds
Subject: Re: 28S resetting itself
Message-ID: <36299@cup.portal.com>
Date: 28 Nov 90 06:28:09 GMT
References: <2700003@hppad.HP.COM>
Organization: The Portal System (TM)
Lines: 11

My HP28C and HP28S have mysteriously cleared themselves a number of times
since 1987.   After a while I noticed that it was almost always in dry
cool weather.   I suspect that it is due to electrostatic discharge.  It
is particularly dangerous to touch a powered up HP28 after walking around
or to walk around with a powered up HP28.   I have had a single instance
of this with an HP48 when i touched it during an archive operation. (ARGHH!)
Always ground yourself before touching a powered up calculator if there is
a possibility that you have built up a static charge.  It might even be a good
idea when it is off, but i haven't seen calculator get zapped when it is off.
John Serafin
jpser@cup.portal.com