Dell D2421H User Manual - Page 44
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Also for Dell D2421H: Service Manual (10 pages)
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Wrong Color
NOTE: When choosing HDMI mode, the Auto Adjust function is not available.
Product-Specific Problems
Specific Symptoms
Screen image is too
small
Cannot adjust the
monitor with the
buttons on the front
panel
No Input Signal when
user controls are
pressed
The picture does not
fill the entire screen
44
│
Troubleshooting
Picture color not
good
What You
Experience
Image is centered
on screen, but
does not fill entire
viewing area
OSD does not
appear on the
screen
No picture, the LED
light is blue. When
you press "up",
"down" or "Menu"
key, the message "
No input signal" will
appear.
The picture cannot
fill the height or
width of the screen
• Change the Color Vision Mode in the
Color Adjust OSD to Graphics or Video
depending on the application.
• Try different User Color in Color Adjust
OSD. Adjust R/G/B value in User Color
OSD if the Color Vision Mode is turned
off.
Possible Solutions
• Check the Aspect Ratio setting in the
Display OSD.
• Reset the monitor to
• Turn off the monitor, unplug the power
cord, plug back, and then turn on the
monitor.
• Check whether the OSD menu is
locked. If yes, press the
button for 10 seconds to unlock (for
more information, see Lock).
• Check the signal source. Ensure the
computer is not in the power saving
mode by moving the mouse or pressing
any key on the keyboard.
• Check whether the signal cable is
plugged in properly. Re-plug the signal
cable if necessary.
• Reset the computer or video player.
• Due to different video formats (aspect
ratio) of DVDs, the monitor may display
in full screen.
Factory
Reset.
button and