Turning on an HP Monitor Locate the Power Button: Look under the bezel (the frame around the screen) on the right-hand side of the monitor. Feel for a small button or indentation. Press the Power Button: Gently press the button you found under the bezel. You should feel a click or see the monitor light up. Verify the Monitor is On: Check the screen to see if it displays the startup screen or your computer's desktop. If the screen remains blank, ensure the monitor is properly connected to a power source and your computer.