Dell U4320Q Users Guide - Page 51
Built-in Diagnostics, Button 4
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Dell UltraSharp 43 Monitor No USB Type-C Cable The display will go into Power Save Mode in 4 minutes. www.dell.com/support/U4320Q U4320Q 4 This box also appears during normal system operation if the video cable becomes disconnected or damaged. 5 Turn off your monitor and reconnect the video cable; then turn on both your computer and the monitor. If your monitor screen remains blank after you use the previous procedure, check your video controller and computer, because your monitor is functioning properly. Built-in Diagnostics Your monitor has a built-in diagnostic tool that helps you determine if the screen abnormality you are experiencing is an inherent problem with your monitor, or with your computer and video card. NOTE: You can run the built-in diagnostics only when the video cable is unplugged and the monitor is in self-test mode. 1 2345 To run the built-in diagnostics: 1 Make sure 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 monitor then goes into the self-test mode. 3 Press and hold Button 4 for 4 seconds. System will pop OSD message, select and press , then system enter BID mode. 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 text screens. 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, the monitor is functioning properly. Check the video card and computer. Troubleshooting | 51
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