I recently won (bad luck?) an auction on two HP41cv(s), the seller claims one works 100% and the other one dead. However, when I got them, one works partially and one doesn't at all due to battery terminal corrosion. I repaired the terminals and hard wire the PC board to the keyboard and both of them partially working, however, after a minute or two the display became auto flickers and it display Chinese characters even I cannot understand. So I searched the Forum for answers and resetting, shorting the battery terminals, shorting the whole pc board with tin foils, strangely, after shorting it with tin foils, both calculator will work longer, like two to ten minutes, I even can do a TVM with an ADVANTAGE module plugged in but only for a few minutes. I notice the Museum has a CD set which has a HP41c “service manual” is that similar to the 41cv ? Can anybody help ?play became auto
HP41cv
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