Alot of the monitors have buttons on the front. One button should get you into the menu. Click the other buttons on the side, until a menu that comes up says "restore factory defaults" Click the menu button once again. The screen should flash a few times and possibly turn on/off.
You can reset your monitor by going into the settings and selecting "restore defaults" then selecting "yes". If the screen is white and unresponsive (flickering-power-led) resetting will not fix it.
1. AC power off (near the VGA/DVI connectors of the monitor)
2. Press and hold the [Up] and [Power] buttons (front panel)
3. AC power on
4. Keeping holding until the message "ALL RESET" appears