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My casio fx-CG 20 is very dim even when there is plenty of battery and the brightness is full too. Pls help i have a test tmr : r/calculators
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How to increase/Decrease Brightness of fx 991ES Casio Calculator [Contras] - YouTube
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Did you know that there Is a way to change the brightness of your scientific calculator? Try this awesome trick and show it to your friends in school!... | By Casio Calculators
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How To Increase Brightness on Casio Calculator - YouTube
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How To Adjust Brightness On Casio Scientific Calculator-Easy Tutorial - YouTube
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