iFixit - Answers With Device "Calculator"

Casio fx-CP400: Touch screen not responding, and when it does it presses wrong things

Fri, 03 Apr 2026 04:40:45 -0700

Touch screen will not work but the little times it does it just presses a button on the opposite side of the screen. Screen has no cracks or scratches. Never been dropped hard or anything. Resetting the calculator does not fix it and now i can't use the calculator since i am stuck in the language option screen. Please help and thank you!

⟐ Answer edited April 03, 2026 at 4:40 MST

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

Mon, 23 Mar 2026 03:47:59 -0700

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

⟐ Answered March 23, 2026 at 3:47 MST

Sharp EL-1197P calculator: Calculator stuck in "On" Position

Fri, 20 Mar 2026 03:38:55 -0700

I took apart a Sharp EL-1197P calculator and cleaned contacts with 91% isopropyl alcohol. When I reassembled it and plugged it back in the power switch was set to off but still turned on. I flipped it back and forth still nothing. Please help!

⟐ Commented March 20, 2026 at 3:38 MST

Casio fx-82ES: Why does my calculator not turn on when I press the on button

Thu, 19 Mar 2026 21:24:41 -0700

Why does my calculator not turn on when I press the on button

⟐ Commented March 19, 2026 at 21:24 MST

Texas Instruments TI-83: Why TI-83 wont turn on

Thu, 26 Feb 2026 06:46:07 -0700

Hi.

I'm having a problem with my TI-83, it doesnt turn on.

I have replace the batteries, the 4 AAA and the

backup one, and followed all the hints supplyed in TI,

troubleshouting section.

It still doesn turn on.

What can I do?

⟐ Commented February 26, 2026 at 6:46 MST

Other Brand Calculator: Check button is not work

Fri, 20 Feb 2026 21:49:35 -0700

Check button is not working

⟐ Commented February 20, 2026 at 21:49 MST

CASIO fx-82AU PLUS II NNATURAL-V.P.A.M.: Why is my 0 not working?

Fri, 20 Feb 2026 09:54:29 -0700

Why is my 0 not working?

TI-89 Titanium: screen ends up freezing after I use it for a while

Wed, 11 Feb 2026 09:27:30 -0700

When I use it for some time, the screen ends up freezing, and the only buttons that work are 2nd, Diamond, Alpha, and copy

Texas Instruments Calculators: ti-86 screen not working

Sat, 24 Jan 2026 02:58:30 -0700

ti-86, when i push the on button, the screen blinks with a bunch of scribble lines on the bottom third of the screen, then nothing

changed all the batteries. dosen't look like there is any damage. prett much looks new.

⟐ Commented January 24, 2026 at 2:58 MST

TI-84 Plus Silver Edition: Calculator won't turn on

Sat, 17 Jan 2026 20:38:49 -0700

My TI-84 Plus calculator will not turn on. It is one year old, and seems like new, but won’t turn on. Any suggestions? I can’t find a reset button on it.

⟐ Commented January 17, 2026 at 20:38 MST

Calculator: Why does my calculator round up to on decimal place?

Wed, 14 Jan 2026 04:14:49 -0700

My calculator has recently started rounding every number to one decimal place, whilst it used to come up with many digits because I need them for school. Even if I type a simple calculation such as 1 + 1 the answer comes up as 2.0 instead of just 2 like it used to

⟐ Answered January 14, 2026 at 4:14 MST

Texas Instruments Calculators: Why does my TI-5660 duplicate entry

Tue, 06 Jan 2026 13:03:51 -0700

Does anyone else have the same issue where it seems the keys are extra sensitive and are duplicating my entry? I love this calculator but cannot continue using it as the duplicate entry are causing such a headache.

⟐ Commented January 06, 2026 at 13:03 MST

Casio fx-82ES: Porque mi calculadora no prende

Sat, 03 Jan 2026 10:18:07 -0700

No enciende,se oprime on y no funciona

⟐ Commented January 03, 2026 at 10:18 MST

Casio FX-991EX: Calculator is in 'PAUSE' mode

Fri, 02 Jan 2026 22:08:15 -0700

The calculation was done in VECTOR mode from the menu. When trying to do something, the calculator hangs, after clearing by the 'ON' button, you can see this status of MENU. Apart from these 3 modes, no other mode is showing, if I want to scroll up or down, the pause sign (2nd picture) is coming on the upper right side.

⁉️ How to get back all mods like before?

⟐ Commented January 02, 2026 at 22:08 MST

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

Casio FX-991EX: The arrow keys, alpha keys and the mode setup key are not working

Wed, 24 Dec 2025 04:00:37 -0700

arrow keys, alpha keys and the mode setup key are not working

Casio fx-580VNX: Why my calculator is not turn on?

Fri, 19 Dec 2025 00:43:18 -0700

my calculator suddenly got off and now it is not turn on? what should i do now?

⟐ Answered December 19, 2025 at 0:43 MST

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

Mon, 08 Dec 2025 09:20:40 -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?

⟐ Answered December 08, 2025 at 9:20 MST

Sharp EL-546XT: My sharp EL/546XT display 3.

Wed, 03 Dec 2025 21:05:43 -0700

I have tried reset and take out the battery and put back. The problem remains. Would you please help me? Thank you very much!

Texas Instruments TI-Nspire CX II: My Battery wont charge when I plug it in.

Fri, 14 Nov 2025 10:23:34 -0700

It turns on when i plug it in and i know the battery works; I tested it in another calculator. I even changed the battery. It works fine when it is plugged in though.

⟐ Commented November 14, 2025 at 10:23 MST