hold the power button for a few seconds, keep in mind there is a sensor for when you take it off it will turn off the lcd.
otherwise try the following:
To perform a factory reset using your phone:
- Open the Oculus app on your phone.
- Tap Settings in the bottom menu.
- Tap the headset connected to your phone.
- Tap More Settings.
- Tap Factory Reset and then Reset.
To perform a factory reset using the headset:
- Turn off your headset.
- Hold the power and volume (-) button on your headset down simultaneously until the boot screen loads on your headset.
- Use the volume buttons on your headset to highlight Factory Reset and press the power button.
- Use the volume buttons on your headset to highlight Yes and press the power button.