Sometimes performing a factory reset is the last resort for troubleshooting. You can return the values of settings on the V-4EX to factory defaults. Here are the steps to restore to Factory Default.
1. Press the [MENU] button to display the menu screen out the built in display.
2. Press the Right Arrow [>] on the touchscreen display
3. Press [SETUP]. The SETUP menu is displayed.
4. Use the Value Dial knob or UP/Down Arrows to scroll to the bottom to "FACTORY RESET"
5. Press [FACTORY RESET].
6. Confirm the reset by pressing the [VALUE] knob. A factory reset is executed.
7. Press the [MENU] button twice to quit the menu screen.