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36 Troubleshooting
Built-in Diagnostics
Your monitor has a built-in diagnostic tool that helps you determine if the problems is
with your monitor or with your computer and video card.
NOTE: You can run the built-in diagnostics only when no display cables are
connected and the monitor is in self-test mode.
To run the built-in diagnostics:
1. Make sure the screen is clean.
2. Unplug the display cable(s) from the computer or the monitor.
The monitor enters theself-test mode.
3. Press and hold button 1 and button 4 simultaneously for 2 seconds.
A gray screenappears.
4. Carefully inspect the screen for abnormalities.
5. Press button 4 again. The color of the screen changes to red.
6. Inspect the display for any abnormalities.
7. Repeat step 5 and step 6 to inspect the display in green, blue, black, white, and
textscreens.
The test is complete when the text-screen appears. To exit, press button 4 again.
If you do not see any screen abnormalities while running the built-in diagnostic,
themonitor is functioning properly. Check the computer and video card for problems.
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