Product Specific Problems - Dell UltraSharp 27 User Manual

Product specific problems

Problem
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
No image
when using DP
connection to
the PC
No image
when using
Thunderbolt
TM
4 connection
to computer,
laptop, and so
on
94 | Troubleshooting
What you Possible solutions
experience
Image is • Check the Aspect Ratio setting in the Display
centered on
screen, but • Reset the monitor to factory settings.
does not fill
entire viewing
area
OSD does not • Turn off the monitor, unplug the monitor power
appear on the
screen • Check whether the OSD menu is locked. If yes,
No picture, the • Check the signal source. Ensure that the
LED light is
white
• Check whether the signal cable is plugged
• Reset the computer or video player.
The picture • Due to different video formats (aspect ratio) of
cannot fill the
height or width • Run the built-in diagnostics.
of the screen
Black screen • Verify which DP standard (DP 1.1a or DP 1.4) is
• Some DP 1.1a graphics card cannot support DP
Black screen • Verify if the Thunderbolt
• Verify if the device required more than 90 W
• Thunderbolt
• Set Windows to Projection mode.
• Ensure that the Thunderbolt
menu OSD.
cable, plug it back, and then turn on the monitor.
move and hold the joystick forward/back/left/
right for 4 seconds to unlock.
computer is not in the power saving mode by
moving the mouse or pressing any key on the
keyboard.
in properly. Connect the signal cable again, if
necessary.
DVDs, the monitor may display in full screen.
your Graphics Card certified to. Download and
install the latest graphics card driver.
1.4 monitors.
device can support DP alternate mode.
power charging.
4 interface of device cannot
TM
support DP alternate mode.
damaged.
4 interface of the
TM
4 cable is not
TM