iFixit - Active Questions With Device "Calculator"

Sharp EL-531X: Come posso riparare lo schermo della calcolatrice?

Wed, 08 Jan 2025 12:21:36 -0700

Salve,

È la seconda volta che mi si rompe lo schermo della calcolatrice (stesso modello) e volevo sapere se ci fosse un modo per riparare solamente lo schermo senza dover comprare un’altra calcolatrice.

Grazie.

⟐ Commented gennaio 08, 2025 at 12:21 GMT-7

Hewlett Packard 48GX: La Calcolatrice non si accende

Thu, 12 Oct 2023 13:41:46 -0700

Buona sera, la mia calcolatrice non si accende più, ho provato con la doppia pressione del tasto on e della zona fra le lettere D ed E.

A chi posso rivolgermi

Un caro saluto

Vittorio

⟐ Commented ottobre 12, 2023 at 13:41 GMT-7

HP-41C: Riparazione della calcolatrice hp41C

Fri, 18 Mar 2022 14:12:34 -0700

Buona sera posseggo una calcolatrice h p 41 C n. seriale 2034A00881 di vecchissima produzione. Tuttavia vorrei farla riparare mi sapete dare informazioni? Grazie

Maurizio

⟐ Answered marzo 18, 2022 at 14:12 GMT-7

TI-84 Plus CE: TI-84 Plus CE - ON Button Not Working To Turn On or Off

Sat, 01 Aug 2026 15:29:39 -0700

The ON keypad button does nothing, but everything else works fine. I can only turn on the calculator in 3 ways:

Remove and reinsert the battery which also clears the RAM.
Press the tiny reset button in the back which also clears the RAM.
Plug in the charging cable while connected to a charger which does not clear the RAM.

When it’s on, I can’t turn it off. Pressing 2nd - ON does nothing. If I leave it alone, it will power off after about 3 minutes of idle time when unplugged and about 15 minutes when connected to a charger. When it's off, pressing the ON button does nothing and I have to use one of the 3 methods above to turn it back on.

I tried everything in "TI-84 Plus CE Recovery Techniques" including reinstalling the OS, but the problem is exactly the same which leads me to believe it’s a hardware problem, so I disassembled it and removed the PCB board, finding some traces of corrosion on the PCB board by the ON switch contact and on the rubber actuator. I cleaned them with alcohol and reinstalled the OS again just in case. I also installed a brand new battery, but after all of that, the symptoms are the same. Any ideas about how to fix this would be greatly appreciated.

⟐ Commented agosto 01, 2026 at 15:29 GMT-7

Casio fx-82MS: No display. I'm trying to turn it on but it isn't working. What to do?

Fri, 31 Jul 2026 05:00:24 -0700

I'm trying to turn my calculator on, but it isn't working. How do I fix it?

Model - CASIO fx-82MS

⟐ Answered luglio 31, 2026 at 5:00 GMT-7

Casio fx-82MS: screen partially working and also having a lack patch in it

Sun, 26 Jul 2026 11:34:41 -0700

So what if my Casio screen has a black patch, thus altering the visibility, you just see some part of the screen, the rest, plus the part of the black patch, does not work

Calculator: Swintec Calculator model 212PD needs fixing

Sun, 12 Jul 2026 11:58:01 -0700

My Swintec 212PD is over 20 years old. I have two of them one has been working fine but the other has been in my garage for that long. I want to donate it to my church, but it needs to work. Is there anything you can do for me?? Regards, Camille

⟐ Commented luglio 12, 2026 at 11:58 GMT-7

Texas Instruments TI-83 Plus: Spare Battery Severely Leaking/Calculator Won't turn on

Sun, 12 Jul 2026 00:03:39 -0700

So, i recently opened up the spare battery compartment of my TI-83 Plus, and noticed one of the spare batteries was slightly bulging. i decided to take it out to examine it. during this process, i had placed 4 new AAA batteries inside of it. (it didn't power on even when new batteries were inserted) When attempting to pry the Button cell battery out, i heard a faint hissing noise. i decided to remove the AAA batteries as a precaution. when i took the button cell out, it was severely corroded. (explains the mystery battery fluid that was appearing in the calculator some months back) i checked the other button cell out of curiosity, (i have an oddball unit that uses 2 LR44 button cells) and it was hardly corroded. there appears to be heavy corrosion on the spring. i was wondering if the calculator could be saved, and what methods i can use to help fix it.

⟐ Answer edited luglio 12, 2026 at 0:03 GMT-7

Casio FX-991ES Plus: Not working. No display. Better also changed. what should I do?

Fri, 10 Jul 2026 09:07:43 -0700

My Casio fx991 es plus calc not working what should I do? No display battery also changed. Advise me please.

⟐ Commented luglio 10, 2026 at 9:07 GMT-7

Casio FX-991EX: Why is my calculator not turning on?

Tue, 30 Jun 2026 20:08:56 -0700

For a while now my calculator just stopped turning on, and till date I have no idea why?

Though it constantly fell before this happened

⟐ Commented giugno 30, 2026 at 20:08 GMT-7

TI-84 Plus CE: My Calculator won’t turn on or charge

Mon, 22 Jun 2026 03:44:02 -0700

Hello! My TI-84Plus CE just completely died the other day. We tried to charge it and it shows now signs that it is charging. The screen doesn’t light up or show anything. We tried replacing the battery, and still the calculator shows no signs of turning on.

Is there anything else that we can trouble shoot?

⟐ Answer edited giugno 22, 2026 at 3:44 GMT-7

Catiga DK-266: Calculators is not working

Sun, 07 Jun 2026 01:50:05 -0700

No matter which button I press on my calculator it's not turning on

⟐ Answered giugno 07, 2026 at 1:50 GMT-7

Texas Instruments Calculators: TI-5660 calculator stopped printing and displays error message

Sat, 06 Jun 2026 03:25:55 -0700

Hi everyone,

I was doing some calculations on my TI 5660 and mid calculation, the printer stopped, it displays an error (E and 0). I checked to see if the paper got jammed, or if the ink ribbon is stuck and both move freely. When I tried to reset the error, the printer makes a buzzing noise and the error is not cleared. Does anyone have any ideas how to fix this? Thanks in advance.

⟐ Commented giugno 06, 2026 at 3:25 GMT-7

Casio Calculator: My calculator water damage how to fixed

Fri, 05 Jun 2026 22:13:37 -0700

My calculator water damage how to fixed

⟐ Answered giugno 05, 2026 at 22:13 GMT-7

TI-84 Plus CE: TI-84 Plus CE repeatedly turning on and off when charging.

Mon, 01 Jun 2026 00:57:46 -0700

My TI-84 Plus CE will repeatedly turn on and off repeatedly in about 1 second intervals while connected to the charging cable, regardless of the power source its connected to (wall outlet, laptop, power brick etc.). It will not turn on at all if not plugged in. I've tried pressing the reset button to no avail. The cable is essentially brand new. This also happened while it should have been at full charge, though it had been about 2 months since it was last fully charged, but it wasn't used in that time until I tried to turn it on recently. I tried taking the battery out and putting back in, and that didn't make a difference either.

⟐ Commented giugno 01, 2026 at 0:57 GMT-7

Catiga DK-266: Any botten is not working

Tue, 26 May 2026 08:07:50 -0700

My calculate batton is not working, some batton are working other are not

⟐ Answered maggio 26, 2026 at 8:07 GMT-7

HP-41C: stopped working after wrong battery installed

Tue, 12 May 2026 11:56:21 -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.

⟐ Commented maggio 12, 2026 at 11:56 GMT-7

TI-84 Plus CE: My calculator is not charging or turning on

Tue, 05 May 2026 05:17:27 -0700

Hi, I just got my calculator (TI-84 plus CE) in the mail and it wasn’t turning on so I plugged it in using the USB cable provided that says it’s for “data transfer and convenient charging”. I am worried because the screen is flashing with a message that says “calculator will restart when validation is complete” so it doesn’t seem to be charging. It’s still not turning on and I have no idea what to do, please help. (This calculator doesn’t have a light on the side so I am unable to see if it is charging or what the battery percentage looks like)

⟐ Answer accepted maggio 05, 2026 at 5:17 GMT-7

TI-84 Plus CE: How can I fix my flashing screen (TI-84+CE)

Mon, 04 May 2026 16:15:47 -0700

My calculator seems to have decided to no longer likes me, and is having startup issues.

It is stuck on a flickering white screen. I can’t turn it off. It doesn’t seem to be turning off on its own. I’d prefer to not have to completely wait for it to drain considering that I just finished charging it yesterday. The calculator does not seem to fully load at all and does not appear in the TI Connect CE program when plugged in to the computer. This is my personal calculator and I’d really like to have it fully working again, and if possible, salvage the programs I have on it. Is there anything I can do, short of buying a new calculator? Or is there a factory reset feature available anywhere I can use?

⟐ Commented maggio 04, 2026 at 16:15 GMT-7

TI-84 Plus CE: Why won't my Ti84 Plus CE turn on?

Mon, 04 May 2026 16:04:07 -0700

My calculator will not turn on despite being at full battery (when it charges it has a green light). The screen does not turn on when I press the on button, instead it stays black. I have even bought a replacement battery online, but this did not seem to help. Before, my calculator would often not turn from time to time, but still turned on occasionally, and it always turned on after a few seconds of charging it, but now it does not.

⟐ Commented maggio 04, 2026 at 16:04 GMT-7