Dell E2421HN Manual do utilizador - Página 41

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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.

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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.

Troubleshooting

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