Perguntas não respondidas sobre Casio FX-991ES Plus
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My Calculator's [AC] & [-] buttons aren't working properly
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calculator is switching off despite I changed the cells
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Why is the on button not working?
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Closes automatically after 3 sec. Even after replacing my battery.
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How to get display brighter and clear which is very light not visible
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Why is my calculator not working?
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cursor is not moving left and right
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My equal(=), Ans and dot (.) button doesn't work. They show 0.
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Shift Solve not working
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Casio fx-991ES PLUS keys 1,4 and 7
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My calculators mode setup options is not visible what should I do?
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How to tighten the case lock of my casio calculator?
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no buttons are working
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The printing on the keys is disappearing (FX115ES-PLUS/FX991ES-PLUS)
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Calculator keypad is damaged
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