Dell UltraSharp 42.51" 4K Monitor - Manual (Page 76)

76 | Troubleshooting
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.
Display
PIP/PBP
Input Source
Color
USB
Brightness/Contrast
Exit
UltraSharp 43 Monitor
Menu
Audio
Personalize
Others
HDMI CEC
LCD Conditioning
Firmware
Reset Others
Factory Reset
Service Tag
Off
12T105
CN073K0
ENERGY STAR ®
DDC/CI On
Off
Display Info Select
Self-Diagnostics Select
To Run the Built-in diagnostics:
1. Ensure that the screen is clean (no dust particles on the surface of the screen).
2. Select OSD items of Self-Diagnostics in Others feature.
3. Press the joystick button to start the diagnostics. A gray screen is displayed.
4. Observe if the screen has any defects or abnormalities.
5. Toggle the joystick once again until a red screen is displayed.
6. Observe if the screen has any defects or abnormalities.
7. Repeat steps 5 and 6 until the screen displays green, blue, black, and white
colors. Note any abnormalities or defects.
The test is complete when a text screen is displayed. To exit, toggle the joystick control
again.
If you do not detect any screen abnormalities upon using the built-in diagnostic tool,
the monitor is functioning properly. Check the video card and computer.