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HP34C display issue
04-07-2021, 09:24 AM
Post: #1
HP34C display issue
Can anybody point me in the direction of somebody who repairs Spice series calculators in the UK, please?

I bought my HP-34C during my uni days - the serial number points to it having been manufactured in Singapore in 1981

I find that the right-most digit on the display no longer works, even though self-test works correctly. Having read up on various forums, this is often caused by battery leakage corrosion; I opened up the case and there is no obvious sign of such corrosion, moreover I do not recall any such leakage. Is there anything else which I could try?

Any pointers and tips gratefully received; many thanks in advance
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04-07-2021, 11:19 AM
Post: #2
RE: HP34C display issue
Is it a solderless model?

If so, I've had luck pushing the display down (ie into the board wedge if the calculator is standing upright) to ensure it connects properly. Even a tiny amount can make a difference (1mm or less).

You don't need to take the halves apart either as there is room when you remove the screws and split the top to reach in with something and apply some pressure.
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04-07-2021, 05:24 PM
Post: #3
RE: HP34C display issue
Thanks dmh

It look like a soldered version - I attach a photo


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