Casio FX-991ES Plus Reparatieforum
VragenHow to repair the display
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How do I fix my calculator that only runs on solar power?
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Facing Problem on my calculator
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need help to repair my calculator
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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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Ratio won’t go into decimal
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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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