52 │ TroubleshootingBuilt-in diagnosticsYour monitor has a built-in diagnostic tool that helps you determine if any screenabnormality you experience is an inherent problem with your monitor, or with yourcomputer and video card.NOTE: You can run the built-in diagnostics only when the video cableis unplugged and the monitor is in self-test mode.1 52 3 4To run the built-in diagnostics:1. Ensure that the screen is clean (no dust particles on the surface of thescreen).2. Unplug the video cable(s) from the back of the computer or monitor. Themonitor then goes into the self-test mode.3. Press and hold the Exit button (button 4) for four seconds to enter the OSDlock/unlock menu.Dell 32 MonitorSelect option:+

Dell S3222HN User Manual