I recently bought a 41CV at a car boot. Found a few problems with it mainly corroded battery terminals, after careful cleaning etc. I reassembled and got the memory lost message (which I think is normal) which then dissappeared. Problem is although all the keys appear to work properly, the appropriate digit appears when you press the key, the display goes blank as soon as I release the key! the information is still there as it re-appears at the next keystroke. Anyone got any ideas?
HP-41CV
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