58
| Troubleshooting
If your monitor screen remains blank after performing the previous step, check your
video controller and computer for any possible issues.
Built-in diagnostics
Your monitor has a built-in diagnostic tool that helps you determine if the screen
abnormality you are experiencing is an inherent problem with your monitor, or with your
computer and video card.
1
2 3 4
5
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 four seconds and a menu appears on the screen.
3. Select the built-in diagnostics
option. A gray screen appears.
4. Carefully inspect the screen for abnormalities.
5. Press Button 1 on the front panel again. The color of the screen changes to
red.
6. Inspect the display for any abnormalities.
7. Repeat steps 5 to 6 to inspect the display when it changes to green, blue,
black, white, and text screens.
The test is complete when the text screen appears. To exit, press button 1 again.
If you do not detect any screen abnormalities during the built-in diagnostic tool, the
monitor is functioning properly. Check the video card and computer for any possible
issues.
