Re: Dead HP-31E, where do I start? Message #2 Posted by db (martinez, ca.) on 17 Jan 2011, 5:15 p.m., in response to message #1 by Paul Gaster
first, do not plug it into that charger. never. if it is dead; that is probably what killed it.
second, you might clean the contacts with vinegar and rinse with alcohol or distilled water if they have blue stuff on them. then note from the battery (it will only go in one way) which is the + and which is the - contact and mark them both as a reference. you probably have some AA rechargables (they are the correct 1.25v). turn the switch to the off position. with some aluminum foil to temporarily make up for the broken contact and to bridge the batteries, you might find that when you switch it on, or after wiggling the batteries, you have a calculator. if not, and if there was blue corrosion, then you might have to take it apart to clean off or paint on new traces. popping off the back is difficult the first time if you only have three hands but there is a very good set of instructions with photos in the articles section of this site.
there are lots of other things to try, but the're down the list.
Edited: 17 Jan 2011, 5:19 p.m.
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