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Scientific calculator by Casio. Widely used by students world-wide due to its great quality for the low price.

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Not working. No display. Better also changed. what should I do?

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

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My Calculator display is gone. How can I repair it

Not working properly only working solar power not working on

It is not working and displaying.

Not working and not displaying

CASIO fx-991ES not working even though replacement of Battery. But its working with solar. pls suggest any things for resolve.

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답변 2개

@shah313 double check to see if there is a reset hole on the back of your calculator. Use a small object to depress the rest button in there. Let us know what you find.

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Thanks for your answer but my calculator still at same position.

I pressed the button but still, nothing happened.

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same problem occured my casio fx-991es plus. i changed battery same problem occured not turn on my calculator but working while solar. so i opened my calculator i check the wire connection solar wires are connected properly and battery black wire it mean negative line cut down. i fixed that issue now my calculator working finely. thanking you.

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Can you please tell me How did you you fix the issue

Same problem can u say me clear procedure

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