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