Dell IN1940MW Display - Manual (Page 46)

Built-in Diagnostics
Your monitor has a built-in diagnostic tool that helps you to determine if the screen abnormality you are experiencing is an inherent problem with your monitor, or with your computer and graphics card.
To run the built-in diagnostics:
1. Ensure 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 monitor. The monitor then goes into the self-test mode.
3. Press and hold the Button 1 and Button 4 on the front panel, simultaneously for 2 seconds. A gray screen appears.
4. Carefully inspect the screen for abnormalities.
5. Press the Button 4 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 white screen appears. To exit, press the Button 4 again.
NOTE: If you do not detect any screen abnormalities during the built-in diagnostics, the monitor is functioning properly. There might be a problem with the graphics card. Contact your computer manufacturer for
further assistance.
Common Problems
The following table contains general information about common monitor problems you might encounter.
Common Symptoms What You Experience Possible Solutions
No Video/Power LED off No picture Ensure that the video cable connecting the monitor and the computer is properly connected
and secure.
Verify that the power outlet is functioning properly using any other electrical equipment.
Ensure that the power button is depressed fully.
No Video/Power LED on No picture or no brightness Increase brightness & contrast controls via OSD.
Perform monitor self-test feature check.
Check for bent or broken pins in the video cable connector.
Touch button 5 located above the power button, ensure that the correct input source is
selected via the Input Source Select menu.
Run the built-in diagnostics.
Poor Focus Picture is fuzzy, blurry, or ghosting Perform Auto Adjust via OSD.
Adjust the Phase and Pixel Clock controls via OSD.
Eliminate video extension cables.
Reset the monitor to Factory Settings.
Change the video resolution to the correct aspect ratio (16:10).
Shaky/Jittery Video Wavy picture or fine movement Perform Auto Adjust via OSD.