Casio FX-991ES Support Question
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Question posted by Anonymous-166045 on March 2nd, 2020
When I Press 1 And 4 It Does Not Appear In The Calculator
When I press 1 and 4 it does not appear in the calculator
Current Answers
Answer #1: Posted by Odin on March 2nd, 2020 11:02 AM
Go though the suggestions under Before Assuming Malfunction of the Calculator at https://www.manualslib.com/manual/25891/Casio-Fx-570es-Plus.html?page=42#manual.
If you require further advice , you'll have to consult Casio. (You can if necessary find contact information at https://www.contacthelp.com.)
Hope this is useful. Please don't forget to click the Accept This Answer button if you do accept it. My aim is to provide reliable helpful answers, not just a lot of them. See https://www.helpowl.com/profile/Odin.
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