iFixit - Answers With Device "HP-41C"

HP-41C: HP 41C Switching On Problem

Tue, 30 Dec 2025 12:10:47 -0700

I have 41C. Since last few days it does not switch on. It means it does switch on some time. The batteries have total voltage of 6 VDC.

⟐ Commented December 30, 2025 at 12:10 MST

HP-41C: Need Help With HP 41C Calculator Repair

Thu, 03 Jul 2025 18:13:27 -0700

Does anyone know where I might be able to get an old HP 41C Calculator repaired or where I might find information on repairing it myself. Hewlett Packard quit making these probably 20 or so years ago. I have had this one since somewhere around 1980 and it has worked until about 6 or 7 years ago. Since it quit working I have not been able to locate anyone that repairs them. Any help would be very much appreciated.

⟐ Commented July 03, 2025 at 18:13 MST

HP-41C: stopped working after wrong battery installed

Wed, 16 Jun 2021 17:19:54 -0700

Battery store installed too powerful a battery (somehow same size as N type so fit} in HP 41CV and it never worked again with N Type. Person said it was “fried” and gave a different model replacement.

Is it possible to fix or is it permanently damaged from overload.

⟐ Answer accepted June 16, 2021 at 17:19 MST

HP-41C: Decimal points going to 2 places

Sun, 28 Jun 2020 15:44:53 -0700

Had 3 decimal points (thousands) by mistake must have hit a button and now have only one decimal place (10ths) NEED to have 2 places or to hundreths ?

How can I get it back?/ Thanks

⟐ Commented June 28, 2020 at 15:44 MST

HP-41C: Restore to original status

Thu, 12 Apr 2018 13:41:14 -0700

I haven't used this HP 41C - RPN calculator in over 25 years. When I stored it, I took the four batteries out for safety. I desire an expert to open it up, clean and make serviceable again for my use.

⟐ Answered April 12, 2018 at 13:41 MST

HP-41C: HP-41CV Calculator not turning on

Thu, 15 Jul 2021 15:26:23 -0700

Hi all, last time I used it was 30+ years ago and it was in perfect condition. Always kept it in its case in dry and dark storage without batteries. I bought fresh batteries but the calculator does not power on. Any suggestion? Thanks

HP-41C: Where to buy battery contacts for hp 41cx?

Fri, 21 Aug 2020 06:10:51 -0700

I have a hp41 cv where the battery contacts are corroded. Where can I buy a set of new contacts?