My equal(=), Ans and dot (.) button doesn't work. They show 0.
Some buttons on my calculator don't work. These are Ans, dot(.) and the equal (=) buttons. They all display zeros(0) when I press them. I can't even solve anything because the equal button doesn't work. It only shows zero. It's a Casio fx-991 es plus calculator.
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If you cannot get help here to clean the keys yourself, do not send it in to CASIO to be repaired, its better to buy a new one and sell this one for spare parts on EBay. The cost of shipping will be more than the price of a new calculator.
por Duane Donaldson