Manual for U2424H/U2424H WOST/U2424HE

Manual for U2424H/U2424H WOST/U2424HE

Brand: Dell

Category: Monitor

Document Type: Manual

Language: EN

Available Languages: EN , ES

Uploaded: Sept. 12, 2025, 4:21 a.m.

Manual Publish Date: 2023-09

Warranty Information

This manual does not contain specific warranty period details.

Setting Up Your Monitor: Attach the stand, organize cables, and connect your monitor using the provided DisplayPort, USB Type-C, or HDMI cables. Adjust tilt, swivel, and vertical extension for optimal viewing. Rotate the monitor clockwise or counterclockwise as needed. Ensure proper connection for MST function and USB Type-C Power Delivery.
Operating the Monitor: Turn on the monitor using the power button. Navigate the On-Screen Display (OSD) menu using the joystick. Access and adjust settings for brightness, color, input source, and more.
Troubleshooting: Run the self-test feature if the screen is dark. Common issues like no video, poor focus, or display lines are addressed with simple solutions like checking connections, resetting settings, or running diagnostics. Specific problems related to USB, image retention, or signal are also covered.

Troubleshooting and error codes

Common Symptoms What You Experience Possible Solutions
No Video/Power LED off No picture
  • Ensure that the video cable connecting the monitor and the computer is properly connected and secure.
  • Verify that the power outlet is functioning properly using any other electrical equipment.
  • Ensure that the Power Button is pressed fully.
  • Ensure that the correct input source is selected in the Input Source menu.
No Video/Power LED on No picture or no brightness
  • Increase brightness & contrast controls by using the OSD.
  • Perform monitor self-test feature check.
  • Check for bent or broken pins in the video cable connector.
  • Run the built-in diagnostics.
  • Ensure that the correct input source is selected in the Input Source menu.
Poor Focus Picture is fuzzy, blurry, or ghosting
  • Eliminate video extension cables.
  • Reset the monitor to factory settings.
  • Change the video resolution to the correct aspect ratio.
Shaky/Jittery Video Wavy picture or fine movement
  • Reset the monitor to factory settings.
  • Check environmental factors.
  • Relocate the monitor and test in another room.
Missing Pixels LCD screen has spots
  • Cycle power on-off.
  • Pixel that is permanently off is a natural defect that can occur in LCD technology.
  • For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at: http://www.dell.com/pixelguidelines.
Stuck-on Pixels LCD screen has bright spots
  • Cycle power on-off.
  • Pixel that is permanently off is a natural defect that can occur in LCD technology.
  • For more information on Dell Monitor Quality and Pixel Policy, see Dell Support site at: http://www.dell.com/pixelguidelines.
Brightness Problems Picture too dim or too bright
  • Reset the monitor to factory settings.
  • Adjust brightness & contrast controls by using the OSD.
Geometric Distortion Screen not centered correctly
  • Reset the monitor to factory settings.
Horizontal/Vertical Lines Screen has one or more lines
  • Reset the monitor to factory settings.
  • Perform monitor self-test feature check and determine if these lines are also in self-test mode.
  • Check for bent or broken pins in the video cable connector.
  • Run the built-in diagnostics.
Synchronization Problems Screen is scrambled or appears torn
  • Reset the monitor to factory settings.
  • Perform monitor self-test feature check to determine if the scrambled screen appears in self-test mode.
  • Check for bent or broken pins in the video cable connector.
  • Restart the computer in the safe mode.
Safety Related Issues Visible signs of smoke or sparks
  • Do not perform any troubleshooting steps.
  • Contact Dell immediately.
Intermittent Problems Monitor malfunctions on & off
  • Ensure that the video cable connecting the monitor to the computer is connected properly and is secure.
  • Reset the monitor to factory settings.
  • Perform monitor self-test feature check to determine if the intermittent problem occurs in self-test mode.
Missing Color Picture missing color
  • Perform monitor self-test feature check.
  • Ensure that the video cable connecting the monitor to the computer is connected properly and is secure.
  • Check for bent or broken pins in the video cable connector.
Wrong Color Picture color not good
  • Try different Preset Modes in Color settings OSD. Adjust the R/G/B value in Custom Color in Color settings OSD.
  • Change the Input Color Format to RGB or YCbCr/YPbPr in the Color settings OSD.
  • Run the built-in diagnostics.
Image retention from a static image left on the monitor for a long period of time Faint shadow from the static image displayed appears on the screen
  • Set the screen to turn off after a few minutes of screen idle time. These can be adjusted in Windows Power Options or Mac Energy Saver setting.
  • Alternatively, use a dynamically changing screensaver.
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, move and hold the joystick up/down/left/right 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 standby 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 port When connected to certain dongle/ docking device at the port, there is no video when unplugging/plugging the Thunderbolt cable from the notebook
  • Unplug the HDMI/DisplayPort cable from dongle/docking device, then plug the docking Thunderbolt cable to the notebook. Plug the HDMI/DisplayPort cable 7 seconds later.
No video at USB Type-C port (applicable for U2424HE only) When connected to certain dongle/ docking device at the port, there is no video when unplugging/plugging the Thunderbolt cable from the notebook
  • Unplug the USB Type-C cable from dongle/docking device, then plug the docking Thunderbolt cable to the notebook. Plug the USB Type-C cable 7 seconds later.
No network connection (applicable for U2424HE only) Network dropped or intermittent
  • Check to ensure USB-C Prioritization is set to High Data Speed.
  • Do not turn off the display during network connection.
Monitor screen becomes dim When Auto Brightness is enabled, the brightness level of the monitor becomes abnormally low, resulting in dimmed screen.
  • Check whether an object is obstructing the sensor area.
  • Ensure a webcam is not mounted over the sensor area.
  • Wipe clean any dust that may be covering the sensor area.
  • Ensure the display is not pivoted and placed to another monitor side-by-side.
USB interface is not working USB peripherals are not working
  • Check that your monitor is turned on.
  • Reconnect the upstream cable to your computer.
  • Reconnect the USB peripherals (downstream connector).
  • Switch off and then turn on the monitor again.
  • Reboot the computer.
  • Certain USB devices such as external portable HDD require higher electric current; connect the device directly to the computer system.
USB Type-C port does not supply power (applicable for U2424HE only) USB peripherals can not be charged
  • Check that the connected device is compliant with the USB-C specification. The USB Type-C port supports USB 3.2 Gen2 and an output of 90 W.
  • Check that you use the USB Type-C cable shipped with your monitor.
SuperSpeed USB 10 Gbps (USB 3.2 Gen2) interface is slow SuperSpeed USB 10 Gbps (USB 3.2 Gen2) peripherals working slowly or not working at all
  • Check that your computer is SuperSpeed USB 10 Gbps (USB 3.2 Gen2)-capable.
  • Some computers have USB 3.2, 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 3.2 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 3.2 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 3.2 port.
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