Dell E2020H 20" 16:9 TN Monitor - Manual (Page 72)

72 │ Troubleshooting
Built-in diagnostics
Your monitor has a built-in diagnostic tool that helps you determine if any screen abnormality
you experience is an inherent problem with your monitor, or with your computer and video
card.
4 3 2 1
Label Description
1 Button 1
2 Button 2
3 Button 3
4 Button 4
To run the built-in diagnostics:
1. Ensure that the screen is clean (no dust particles on the surface of the screen).
2. Press and Hold button 1 for about 4 seconds and wait for a pop up menu.
3. Press button 3 or 4 to select the diagnostic tool and confirm with button 2.
A gray test pattern appears at the beginning of the diagnostic program.
4. Carefully inspect the screen for abnormalities.
5. Press button 4 to change the test patterns.
6. Repeat steps 4 and 5 to inspect red, green, blue, black, white and text screens.
7. Press button 4 to end the diagnostic program.