iFixit - Answers With Device "HP Calculator"

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

Hewlett Packard 48GX: repair for mutiple 48gx

Sun, 11 Feb 2024 11:34:14 -0700

looking for a place that will repair hp calculators. have used fixthatcalc in the past, but get no response now. is there any other places?

⟐ Answered February 11, 2024 at 11:34 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

Hewlett Packard 48GX: The metal came apart from the foam in the battery compartment

Mon, 26 Jun 2023 10:36:34 -0700

The metal has come off the foam in the battery compartment. I used adhesive glue to bind the two together but every time I put batteries in it the metal detached from the foam. Any help would be appreciated.

⟐ Answered June 26, 2023 at 10:36 MST

Hewlett Packard 48GX: The screen has spider cracks, Where can I send it to replace it?

Wed, 02 Feb 2022 20:20:44 -0700

The screen of my HP-48GX has spiders cracks, the calculator still works and I love it, I have had this calculator for over 20 years and still works, Does any of you know where can I send it to get it fix? thank you

⟐ Answer accepted February 02, 2022 at 20:20 MST

Hewlett Packard 48GX: Screen has gone dim on right side

Thu, 29 Aug 2019 04:54:50 -0700

The right side of the screen has gone dim and is unreadable. How can it be repaired.

⟐ Answer accepted August 29, 2019 at 4:54 MST

Hewlett Packard 48GX: Are there any repair kits available? my keyboard doesn't work

Sun, 10 Jul 2022 13:47:58 -0700

Only the enter, 7, 4, 1 and zero keys work.

How do you open the case without destroying the case and/or looks?

Any common problems with the keyboard that I should look for?

Once I'm inside, are there any upgrades to do before I exit and put it back together?

I love this machine, it got me through engineering school and I really hate to abandon my "war buddy"

Any suggestions would be appreciated,

Thanks

Tim

⟐ Answered July 10, 2022 at 13:47 MST

Hewlett Packard 48GX: How to disarm the hp48?

Sat, 08 May 2021 11:00:09 -0700

I need to disarm it to replace the screen

⟐ Answered May 08, 2021 at 11:00 MST

Hewlett Packard 48GX: Can the screen be replaced?

Wed, 01 Jan 2025 20:08:49 -0700

The screen is damaged and I would like to replace it,

⟐ Commented January 01, 2025 at 20:08 MST

Hewlett Packard 48GX: dark screen unable to read menu

Fri, 05 Aug 2016 00:04:56 -0700

my screen is getting dark un able to see the menu

⟐ Commented August 05, 2016 at 0:04 MST

Hewlett Packard 48GX: rar archive problem opening

Fri, 16 Dec 2016 10:24:19 -0700

I created rar file on my computer. When I started to open .rar archive I got an error - Packed data CRC failed in volume name. The volume is corrupt. I don't know how to make rarrecovery. Any help, please.

⟐ Answer accepted December 16, 2016 at 10:24 MST

HP Calculator: hp45 calculator How to repair charger/power unit

Fri, 26 Jul 2024 01:19:23 -0700

I have three of these calculators but two of the power units have failed. Does anyone have any information to help me get inside (the power units) and repair them?

⟐ Answered July 26, 2024 at 1:19 MST

Hewlett Packard 48GX: How are batteries exchanged?

Wed, 22 Mar 2023 21:29:42 -0700

How are batteries installed?

⟐ Answered March 22, 2023 at 21:29 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

Hewlett Packard 48GX: no longer can be turned onl

Wed, 02 Oct 2019 09:21:01 -0700

I removed the batteries without turning the 48sx off. It no longer powers up. Can this issue be repaired.

⟐ Commented October 02, 2019 at 9:21 MST

Hewlett Packard 48GX: I need a back plate for the battery area. Where can I get one?

Tue, 18 Sep 2018 19:36:23 -0700

Where can I get a replacement door for the back of my HP48 g calculator?

⟐ Answer accepted September 18, 2018 at 19:36 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

Hewlett Packard 48GX: Calculator not turning on

Tue, 03 Apr 2018 11:31:08 -0700

I have changed the batteries several times and the calculator will not turn on.

⟐ Answered April 03, 2018 at 11:31 MST

Hewlett Packard 48GX: What is invalid card data

Mon, 20 Feb 2017 18:13:05 -0700

when the calculator is turned on ,invalid card data appears.i have the survey gx and the 512k gx cards

⟐ Answer edited February 20, 2017 at 18:13 MST