Built-in diagnostics – Dell U2422H 23.8" 16:9 IPS Monitor User Manual
Page 87
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Troubleshooting
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87
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.
To run the built-in diagnostics:
1.
Ensure that the screen is clean (no dust particles on the surface of the
screen).
2.
Toggle and hold the Joystick to the
up
or
down
or
left
or
right
for about 4
seconds until a pop menu appears.
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