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Dell Thunderbolt U4025QW User Manual

Dell Thunderbolt U4025QW
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Troubleshooting | 105
Universal Serial Bus (USB) specific problems
Specific
Symptoms
What you experience Possible solutions
USB interface is
not working
USB peripherals are
not working
Check that your display is turned ON.
Reconnect the upstream cable to your
computer.
Reconnect the USB peripherals
(downstream connector).
Turn o the monitor and turn it on again.
Reboot the computer.
Certain USB devices such as portable
hard drives require higher power source;
connect the drive to the computer
directly.
SuperSpeed
USB 3.2 Gen2
interface is
slow.
SuperSpeed USB
3.2 Gen2 peripherals
working slowly or not
working at all
Check that your computer is USB
3.0-capable.
Some computers have USB 3.0, USB
2.0, and USB 1.1 ports. Ensure that the
correct USB port is used.
Reconnect the upstream cable to your
computer.
Reconnect the USB peripherals
(downstream connector).
Reboot the computer.
Wireless USB
peripherals stop
working when a
USB 3.0 device
is plugged in
Wireless USB
peripherals responding
slowly or only working
as the distance
between itself and its
receiver decreases
Increase the distance between the USB
3.0 peripherals and the wireless USB
receiver.
Position your wireless USB receiver as
close as possible to the wireless USB
peripherals.
Use a USB-extender cable to position
the wireless USB receiver as far away as
possible from the USB 3.0 port.

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Dell Thunderbolt U4025QW Specifications

General IconGeneral
Screen Size40 inches
Aspect Ratio21:9
Panel TypeIPS Black
Refresh Rate60 Hz
Color Support1.07 billion colors
Curvature2500R
VESA Mount100 x 100 mm
KVM SwitchYes
Resolution5120 x 2160
Brightness300 cd/m²
Contrast Ratio1000:1
Response Time5 ms
Color Gamut98% DCI-P3
PortsRJ45
Speakers2 x 9W
Built-in MicrophoneYes
Stand AdjustabilityHeight, Tilt, Swivel
Weight (with stand)14.4 kg

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