Casio fx-5800P - Manual (Page 136)

E-135
k Before assuming malfunction of the calculator...
Perform the following steps whenever an error occurs during a calculation or when calculation
results are not what you expected. If one step does not correct the problem, move on to the next
step. Note that you should make separate copies of important data before performing these steps.
1 Check the calculation expression to make sure it does not include any errors.
2 Make sure that you are using the correct mode for the type of calculation you are trying to
perform.
3 Perform the following steps.
(1) Press Nc3(SYSTEM) to enter the SYSTEM Mode.
(2) Press 2(Reset Setup).
(3) On the confi rmation screen that appears, press E(Yes).
(4) Press J.
(5) Press N to display the calculation mode menu, and select the appropriate calculation
mode for the type of calculation you want to perform.
(6) Perform the calculation again.
4
Press the P button on the back of the calculator with a thin, pointed object to initialize the
calculator. If you perform this procedure correctly, the calculator will return to the state it was in
the last time you turned it off.
P button
5 If step 4 does not restore normal operation, initialize all modes and settings by pressing
Nc3(SYSTEM)3(Reset All) E(Yes).
• For details, see “To reset the calculator to initial defaults” (page 1).
Important!
• Calculation history data, memory data, statistical calculation sample data, program data, and
all other input data is deleted.
k Lower Battery Indicator
The message shown below appears when battery power goes low. When this happens, stop using
the calculator, turn it off, and replace its battery.
Important!
• The calculator’s data transfer function is disabled while the Low Battery message is on the
display.
P P