: Load the "Format" file first from a USB drive to wipe the internal memory.
If your keyboard is still operational but behaving strangely, use the internal software command: Press the button. Select the Utility tab on the screen. Choose Factory Restore . korg pa2x pro factory reset
Are you resetting due to a or are you preparing the keyboard for a new user ? KORG Pa900 1.0 Quick Guide (E1) : Load the "Format" file first from a