Casio FX-991ES Plus Repair Forum
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started working like that of Casio 115 ES 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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Solar panel is broken
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How to Change Mode
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Where I get service parts
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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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How do I fix my calculator that only runs on solar power?
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Shift Solve not working
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