My HP-25C Died!!! <snif> Message #1 Posted by Ian Primus on 14 Dec 2001, 6:02 p.m.
I was using my beloved HP-25C during my math class, and as I reached for the multiplication key during some long equation crunching, the display died. My first instinct was to replace the batteries. (I had temporarily soldered a AAA battery clip in there until I get a rechargeable pack, I have one on it's way.) So when I got home, I removed my electrical tape from the back (holding in the batteries) and replaced the AAA's with two fresh ones from the battery charger (I was using NiMH, they last longer), and when I turned the calc back on, it didn't do anything. I got more investigative today and took the calc apart, and removed my battery clip mod, and hooked up some AA's via aligator clips to the correct terminals. Still nothing. I went through and checked a couple diodes and resistors that had crummy solder joints, to no avail. I don't know much about HP calculator repair, but I am determined to get this working again. Since this calc was most likely sitting unused for several years before I got it (about a week ago), is there any chance that something may have dried out in there that was startled by my sudden use of it, or something that could have jiggled loose (I carried it in my pocket to prevent it from getting damaged in my backpack) Any ideas as to what could prevent the calc from turning on would be appreciated. Also, while I know this is not the place, and I will place an ad in the classifieds when I find out what part I need to replace, I may be in need of another broken calculator for parts. Any help would be appreciated. BTW - when my HP died, I went into RPN withdrawl, having to go back to my TI-83+, and I found the most wonderful peice of TI-83+ software on the net - http://www.chem.com.au/cp/software/ti83/rpn/ Reverse Polish Notation for the TI-83+! I love it! This site even has a link here for more info on RPN. Long live the HP (I hope...)
Ian Primus
ian_primus@yahoo.com
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