58 | Troubleshooting
Built-in Diagnostics
Your display has a built-in diagnostic tool that helps you determine if the screen abnormality you
are experiencing is an inherent problem with your display, or with your computer and video card.
NOTE: You can run the built-in diagnostics only when the video cable is unplugged
and the display is in self-test mode.
To run the built-in diagnostics:
1. Make sure 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 display. The display
then goes into the self-test mode.
3. Touch and hold for 5 seconds. A gray screen appears.
4. Carefully inspect the screen for abnormalities.
5. Touch on the front panel 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.
The test is complete when the text screen appears. To exit, touch again.
If you do not detect any screen abnormalities upon using the built-in diagnostic tool, the display
is functioning properly. Check the video card and computer.
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