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Mode not working fx-991ES

fx-991ES mode problem shift problem Function mode

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#1 khraza



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Posted 01 June 2021 - 09:35 AM

After using function mode. Now I can't switch back to COMP mode.
The shift & mode button is not working.
After waiting for 20 minutes in the table display, I opened the calculator & rested the battery. Now I escaped the table mode. Now returned to which mode, I am unsure.s
Only D & Math is displayed on top of the display.
I can do basic math operations but still can not access the mode or shift button
After auto turning off, the problem remains

Also tagged with one or more of these keywords: fx-991ES, mode problem, shift problem, Function mode

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