Question about Casio FX991MS Scientific Calculator
It sounds like some dirt or moisture got on the touch pads. It can be fixed. If you have a set of small screwdrivers and you are good with taking stuff apart, turn the calculator around and remove the screws holding the case together. If you have never done this kind of work, there is a very detailed Utube video explaining the whole operation from A to Z.
Posted on Mar 29, 2015
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Posted on Jan 02, 2017
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