Dell D2020H Manual do utilizador - Página 40

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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.

NOTE: You can run the built-in diagnostics only when the video

cable is unplugged and the monitor is in self-test mode.

Label Description

Button 1

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

monitor then goes into the self-test mode.

3. Press and hold Button 1 for 5 seconds. A gray screen appears.

4. Carefully inspect the screen for abnormalities.

5. Press Button 1 on the bottom of the monitor 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.

Troubleshooting