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Casio FX-991EX questions

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1 Answer

Why is my calculator not turning on?

accepted Casio FX-991EX 1 Answer

Commented

Sep 28, 2026

commented Sep 28, 2026 by Alvin

4 Answers

Calculator is in 'PAUSE' mode

Casio FX-991EX 4 Answers

Commented

Apr 14, 2026

commented Apr 14, 2026 by Amin Iqbal

0 Answers

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

unanswered Casio FX-991EX 0 Answers

Asked

Dec 24, 2025

asked Dec 24, 2025 by Morrison

2 Answers

keypad does not work properly

Casio FX-991EX 2 Answers

Shajedur Rahman

Answered

Aug 5, 2025

answered Aug 5, 2025 by Shajedur Rahman

0 Answers

Why is my calculator turned on and off consecutively for no reason?

unanswered Casio FX-991EX 0 Answers

Asked

Mar 11, 2025

asked Mar 11, 2025 by fell

0 Answers

keys keep getting stuck

unanswered Casio FX-991EX 0 Answers

Asked

Jul 27, 2024

asked Jul 27, 2024 by gma

1 Answer

have an issue that ENG feature is not at all working

Casio FX-991EX 1 Answer

jayeff 551.6k

Answer edited

Mar 8, 2023

answer edited Mar 8, 2023 by jayeff

0 Answers

Can I fix the calculator’s screen?

unanswered Casio FX-991EX 0 Answers

Shams Aldin Hamdy 25

Asked

Feb 22, 2023

asked Feb 22, 2023 by Shams Aldin Hamdy

Casio FX-991Ex

0 Answers

How do I fix isolated solar panel for my calculator

unanswered Casio FX-991Ex 0 Answers

joseph aihebhoria

Asked

May 7, 2022

asked May 7, 2022 by joseph aihebhoria