Casio FX-991ES Plus Repair Forum
AskHow to repair the display
accepted Casio FX-991ES Plus 2 Answers
How do I fix my calculator that only runs on solar power?
accepted Casio FX-991ES Plus 2 Answers
Solar panel is broken
Casio FX-991ES Plus 1 Answer
How to Change Mode
Casio FX-991ES Plus 1 Answer
Where I get service parts
accepted Casio FX-991ES Plus 1 Answer
started working like that of Casio 115 ES plus.
unanswered Casio FX-991ES Plus 0 Answers
My Calculator's [AC] & [-] buttons aren't working properly
unanswered Casio FX-991ES Plus 0 Answers