Here’s how to return the E-4 to its factory-set state.
While holding down the [ð] (stop) button, turn on the power.
The [â/ó] (play/record) button button blinks.
To cancel the factory reset, turn off the power.Press the [â/ó] (play/record) button button.
The factory reset is executed.
When all buttons are blinking, turn the power of the E-4 off and then on again.