30 Troubleshooting Instructions
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.
Figure 29. Built-in diagnostics function buttons
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 4 for about 4 seconds and wait for a pop-up menu.
3. Use Button 1 or 2 to select the and press to confirm.
A gray test pattern appears at the beginning of the diagnostic program.
4. Carefully inspect the screen for abnormalities.
5. Press Button 1 to change the test patterns.
6. Repeat steps 4 and 5 to inspect the display in red, green, blue, black, white, and text screens.
7. When in a White color test screen, check for white color uniformity and if there white color appears greenish/reddish, so on.
8. Press Button 1 to end the diagnostic program.
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