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

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How to repair the display

How to repair the display of a Casio FX-991ES Plus Calculator

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itIf it’s just that a line may be missing in the display or certain sections of the display is not working,

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Hi @angeltwayana ,

What is the problem with the display?

If it needs replacing unfortunately, I’ve been unable to find a replacement LCD screen. You may have better luck.

Given the cost of a new calculator it may be uneconomically viable to replace the screen even if you could find a replacement part.

If it’s just that a line may be missing in the display or certain sections of the display is not working, you could always try dis-assembling the calculator and inspect the display module connections to the systemboard in case it is a faulty connection that is causing the problem.

Always remove the power source or battery from electronic equipment before starting any repairs etc.

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I would recommend buying an fx-82es and swapping screens, as they are the exact same screen.

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