Casio SERIES FX-9860G - Manual (Page 65)

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When you keep having problems…
1-10 When you keep having problems…
If you keep having problems when you are trying to perform operations, try the following
before assuming that there is something wrong with the calculator.
k Getting the Calculator Back to its Original Mode Settings
1. From the Main Menu, enter the SYSTEM mode.
2. Press 5(RSET).
3. Press 1(STUP), and then press 1(Yes).
4. Press Jm to return to the Main Menu.
Now enter the correct mode and perform your calculation again, monitoring the results on the
display.
k In Case of Hang Up
• Should the unit hang up and stop responding to input from the keyboard, press the P button
on the back of the calculator to reset the calculator to its initial defaults. See the Hardware
User’s Guide for details.
Note, however, that this may clear all the data in calculator memory.