The following procedure will clear the internal memory and reload the factory settings:
(CAUTION!!!!: All USER information will be lost!!! Be sure to back up any information you wish to keep!!!)
1. Turn the FP-4 off.
2. While holding down the FUNCTION button, turn the FP-4 back on.
3. Continue holding the FUNCTION button until “Fct” appears in the display.
4. Release the FUNCTION button.
5. When the display returns to normal, the factory settings have been restored.
NOTE: Never turn off the power during a Factory Reset. This may result in corrupted internal data and may prevent the power from being turned on again.