Dell UltraSharp U2718Q User Manual

Dell UltraSharp U2718Q User Manual Manual pdf 51 page image

Troubleshooting | 51Built-in DiagnosticsYour monitor has a built-in diagnostic tool that helps you determine if the screenabnormality you are experiencing 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 cable is unpluggedand the monitor is in self-test mode.To run the built-in diagnostics:1 Ensure that the screen is clean (no dust particles on the surface of the screen).2 Unplug the video cable(s) from the back of the computer or monitor. The monitorthen goes into the self-test mode.3 Press and hold Button 1 on the front panel for 5 seconds. A gray screen appears.4 Carefully inspect the screen for abnormalities.5 Press Button 1 on the front panel again. The color of the screen changes to red.6 Inspect the display for any abnormalities.7 Repeat steps 5 and 6 to inspect the display in green, blue, black, white and textscreens.The test is complete when the text screen appears. To exit, press Button 1 again.If you do not detect any screen abnormalities upon using the built-in diagnostic tool, themonitor is functioning properly. Check the video card and computer.