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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1 Answer

@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.


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