Dell U2520D Users Guide - Page 68

Product specific problems, Common, symptoms, What you, experience, Possible solutions, Aspect Ratio

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Page 68 highlights

Product specific problems Common symptoms What you experience Possible solutions Screen image is too Image is centered on • Check the Aspect Ratio setting in smal l screen, but does not the Display menu OSD. fill entire viewing area • Reset the monitor to factory settings. Cannot adjust the monitor with the buttons on the front panel OSD does not • Turn Off the monitor, unplug the appear on the screen power cord, plug it back, and then turn On the monitor. • Check whether the OSD menu is locked. If yes, press and hold the Menu/function button next to the Power button for 4 seconds to unlock (for more information, see Lock). No Input Signal No picture, the LED when user controls light is white are pressed • 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. The picture does not fill the entire screen The picture cannot • Due to different video formats fill the height or (aspect ratio) of DVDs, the monitor width of the screen may display in full screen. • Run the built-in diagnostics. No video at HDMI/ When connected to DisplayPort/USB some dongle/ Type-C port docking device at the port, there is no video when unpluging/pluging the Thunderbolt cable from the notebook • Unplug the HDMI/DisplayPort/USB Type-C cable from dongle/docking device, then plug the docking Thunderbolt cable to the notebook. Plug the HDMI/DisplayPort/USB Type-C cable 7 seconds later. 68 │ Troubleshooting

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68± ±
│
± ± Troubleshooting
Product specific problems
Common
symptoms
What you
experience
Possible solutions
Screen image is too
small
Image is centered on
screen, but does not
fill entire viewing
area
•
Check the
Aspect Ratio
setting in
the
Display
menu OSD.
•
Reset the monitor to factory settings.
Cannot adjust the
monitor with the
buttons on the
front panel
OSD does not
appear on the screen
•
Turn Off the monitor, unplug the
power cord, plug it back, and then
turn On the monitor.
•
Check whether the OSD menu is
locked. If yes, press and hold the
Menu/function button next to the
Power button for 4 seconds to unlock
(for more information, see
Lock
).
No Input Signal
when user controls
are pressed
No picture, the LED
light is white
•
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.
The picture does
not fill the entire
screen
The picture cannot
fill the height or
width of the screen
•
Due to different video formats
(aspect ratio) of DVDs, the monitor
may display in full screen.
•
Run the built-in diagnostics.
No video at HDMI/
DisplayPort/USB
Type-C port
When connected to
some dongle/
docking device at
the port, there is no
video when
unpluging/pluging
the Thunderbolt
cable from the
notebook
•
Unplug the HDMI/DisplayPort/USB
Type-C cable from dongle/docking
device, then plug the docking
Thunderbolt cable to the notebook.
Plug the HDMI/DisplayPort/USB
Type-C cable 7 seconds later.