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HP-41C with 23A batteries - remedy possible?
11-15-2017, 03:28 PM
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mfleming Offline
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RE: HP-41C with 23A batteries - remedy possible?
I bought an HP 28C a while back, advertised as not working, that had three of those 12V batteries installed. Thankfully the the calculator survived!

If you have a second 41, try swapping the CPU boards to see if you can isolate the fault to the CPU board and/or to the display. Also check after removing the battery pack to see if there is a residual voltage on the capacitor(s) at the upper left edge of the board. You may (likely!) have exceeded their voltage rating and damaged them. They could be replaced.

HTH,
~Mark
Remember kids, "In a democracy, you get the government you deserve."
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RE: HP-41C with 23A batteries - remedy possible? - mfleming - 11-15-2017 03:28 PM



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