HP Forum Archive 19

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1972 HP-35 With Bug Message #1 Posted by aj04062 on 14 May 2010, 10:40 p.m. I just got one of these of eBay. The battery was dead and the owner did not claim that it worked. I immediately tried a rebuilt battery I have and it did not work. However, when plugged in with the wall charger, it does. I presume the two outside contacts on the charger plug socket must make contact when running on batteries. This contact is a little corroded. Is it safe to jump these to determine for sure that this bad connection isnt the fault? I do not think I want to break into this calculator to look at the contacts beneath the battery tray as the label is in pretty good shape. Thoughts on easy fixes?

Re: 1972 HP-35 With Bug Message #2 Posted by Ignazio Cara (Italy) on 15 May 2010, 2:57 a.m., in response to message #1 by aj04062 Hello, congrats for your new calculator, and yes, is safe to connect the two extreme pin to verify if the calculator works with the battery pack inserted. But if you want replace or clean the original jump, you must open the body removing, even partially, the rear label. HTH Regards Ignazio

Re: 1972 HP-35 With Bug Message #3 Posted by aj04062 on 15 May 2010, 9:27 a.m., in response to message #2 by Ignazio Cara (Italy) It is alive. Good deal.

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