Dell UltraSharp 24 USB-C Hub Monitor - U2421E User’s Guide Model: U2421E Regulatory model: U2421Et
NOTE: A NOTE indicates important information that helps you make better use of your computer. CAUTION: A CAUTION indicates potential damage to hardware or loss of data if instructions are not followed. WARNING: A WARNING indicates a potential for property damage, personal injury, or death. Copyright © 2020 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective owners.
Contents Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 About your monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Package contents . . . . . . . . . . . . . . . . . . . . . . . . . 6 Product features . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Identifying parts and controls . . . . . . . . . . . . . . . . . . . 8 Front view . . . . . . . . . . . . . . . . .
Tilt, swivel and vertical extension . . . . . . . . . . . . . . . . . . . . . . 32 Rotating the Display . . . . . . . . . . . . . . . . . . . . . . . 32 Configuring the display settings on your computer after rotation33 Connecting your monitor . . . . . . . . . . . . . . . . . . . . .34 Organizing your cables . . . . . . . . . . . . . . . . . . . . . .38 Securing your monitor using Kensington lock (optional) . . . .
Safety instructions WARNING: Use of controls, adjustments, or procedures other than those specified in this documentation may result in exposure to shock, electrical hazards, and/or mechanical hazards. • Place the monitor on a solid surface and handle it carefully. The screen is fragile and can be damaged if dropped or hit sharply. • Always be sure that your monitor is electrically rated to operate with the AC power available in your location. • Keep the monitor in room temperature.
About your monitor Package contents Your monitor ships with the components shown in the table below. If any component is missing, contact Dell. For more information, see Contact Dell. NOTE: Some components may be optional and may not ship with your monitor. Some features may not be available in certain countries.
USB Type-C cable (C to C) U2421E Color Calibration Factory Report Every Dell U2421E is shipped incorporating pre-tuned standard mode(sRGB) with average Delta-E ≤2. This helps prevent significant color inconsistency or inaccuracy when content is displayed onscreen. In addition, a tighter grey-scale tracking on each U2421E helps enable ultra-smooth color gradation. The factory measurements from this very unit are shown here.
Identifying parts and controls Front view 1 Label 1 Description Power LED indicator 8 | About your monitor Use Solid white light indicates the monitor is turned on and functioning normally. Blinking white light indicates the monitor is in Standby Mode.
Back view 1 2 3 45 7 6 Label Description Use 1 VESA mounting holes (100 mm Wall mount monitor using VESAx 100 mm-behind attached compatible wall mount kit (100 mm x 100 VESA cover) mm). 2 Regulatory label Lists the regulatory approvals. 3 Stand release button Releases stand from the monitor. 4 Power On/Off button To turn the monitor on or off. 5 Joystick Use it to control the OSD menu.
Bottom view 9 13 1 Label Description 2 3 4 5 6 7 8 9 10 11 12 Use 1 Security lock slot Secures monitor with security cable lock (sold separately). 2 Power connector Connect the power cable. 3 HDMI port Connect your computer with the HDMI cable. 4 DisplayPort in Connect your computer with the DisplayPort cable. 5 USB Type-C/ DisplayPort Connect to your computer using the USB Type-C cable. The USB Type-C port offer the fastest transfer rate and the alternate mode with DP 1.
10 RJ-45 connector Connect Internet. You can surf Internet via RJ45 only after you have connected the USB cable(Type-A to Type-C or Type-C to Type-C) from the computer to the monitor. 12 USB Type-C Port with icon supports 5 V/ 3 A. downstream port Connect your USB device. You can use these ports only after you have connected the USB cable (Type-A to Type-C or Type-C to Type-C) from the computer to the monitor. 13 Stand lock Lock the stand to the monitor using a M3 x 8 mm screw (screw not included).
Color gamut* 99% sRGB 99% REC709 Calibration accuracy Delta E < 2 (average) Connectivity • 1 x DP 1.4 • 1 x HDMI1 .4 • 1 x USB Type-C (Alternate mode with DisplayPort 1.4, USB 3.2 Gen 1 upstream port, Power Delivery PD up to 90 W) • 1 x USB Type-C downstream (15 W), USB 3.2 Gen 1 (5 Gbps) • 1 x DP (Out) with MST • 2 x SuperSpeed USB 5 Gbps (USB 3.2 Gen 1) • 1 x SuperSpeed USB 5 Gbps (USB 3.2 Gen 1) with BC 1.2 charging capability at 2 A (max) • 1 x Analog 2.0 audio line out (3.
Maximum preset resolution 1920 x 1200 at 60 Hz Video display capabilities (HDMI & DP & USB 480i, 480p, 576i, 560p, 720p, 1080i, Type-C alternate mode) 1080p Preset display modes Display mode VGA 720 x 400 VGA 640 x 480 VESA 640 x 480 VESA 800 x 600 VESA 800 x 600 VESA 1024 x 768 VESA 1024 x 768 MAC 1152 x 864 VESA 1280 x 1024 VESA 1280 x 1024 CVT 1600 x 900 CVT 1920 x 1080 CVT 1920 x 1200 Horizontal frequency (kHz) 31.47 31.47 37.5 37.88 46.88 48.36 60.02 67.5 64 80 55.99 67.5 74.
HBR3 2 HBR2 1 Electrical specifications Video input signals Input voltage/ frequency/current Inrush current Power Consumption • Digital video signal for each differential line Per differential line at 100 ohm impedance • DP/HDMI/USB Type-C signal input support 100-240 VAC / 50 or 60 Hz ± 3 Hz / 2.1 A (maximum) 120 V: 42 A (Max.) 240 V: 80 A (Max.) Inrush current is measured at an ambient temperature of 0°C. 0.2 W (Off Mode)1 0.2 W (Standby Mode)1 17.2 W (On Mode)1 186 W (Max)2 16.16 W (Pon)3 52.
Physical characteristics Connector type • DP connector (include DP in and DP out) • HDMI connector • USB Type-C connector • Audio line-out • RJ45 connector • USB Type-C downstream connector x 1 (Port with icon supports 5 V/3 A) • USB 3.2 Gen 1 downstream port connector x 3 (Port with battery icon supports BC 1.2.) Signal cable type DP to DP 1.8 M cable USB Type-C (C to C) 1.0 M cable USB Type-C (C to A) 1.8 M cable Dimensions (with stand) Height (extended) 510.7 mm (20.11 in.
Weight without stand assembly (For wall mount or VESA mount considerations - no cables) Weight of stand assembly 4.0 kg (8.8 lb) 1.7 kg (3.7 lb) Environmental characteristics Compliant Standards • ENERGY STAR certified Monitor. • EPEAT registered where applicable. EPEAT registration varies by country. See www.epeat.net for registration status by country. • TCO Certified Display. • RoHS Compliant. • BFR/PVC Free monitor (excluding external cables). • Meets NFPA 99 leakage current requirements.
Pin assignments DP port (in) Pin number 20-pin side of the connected signal cable 1 ML3(n) 2 GND 3 ML3(p) 4 ML2(n) 5 GND 6 ML2(p) 7 ML1(n) 8 GND 9 ML1(p) 10 ML0(n) 11 GND 12 ML0(p) 13 CONFIG1 14 CONFIG2 15 AUX CH (p) 16 GND 17 AUX CH (n) 18 Hot Plug Detect 19 Return 20 DP_PWR About your monitor | 17
DP port (out) Pin number 20-pin side of the connected signal cable 1 ML0(p) 2 GND 3 ML0(n) 4 ML1(p) 5 GND 6 ML1(n) 7 ML2(p) 8 GND 9 ML2(n) 10 ML3(p) 11 GND 12 ML3(n) 13 CONFIG1 14 CONFIG2 15 AUX CH(p) 16 GND 17 AUX CH(n) 18 Hot Plug Detect 19 Return 20 DP_PWR 18 | About your monitor
HDMI port Pin number 19-pin side of the connected signal cable 1 TMDS DATA 2+ 2 TMDS DATA 2 SHIELD 3 TMDS DATA 2- 4 TMDS DATA 1+ 5 TMDS DATA 1 SHIELD 6 TMDS DATA 1- 7 TMDS DATA 0+ 8 TMDS DATA 0 SHIELD 9 TMDS DATA 0- 10 TMDS CLOCK+ 11 TMDS CLOCK SHIELD 12 TMDS CLOCK- 13 CEC 14 Reserved (N.C.
USB Type-C port Pin Signal Pin Signal A1 GND B12 GND A2 SSTXp1 B11 SSRXp1 A3 SSTXn1 B10 SSRXn1 A4 VBUS B9 VBUS A5 CC1 B8 SBU2 A6 Dp1 B7 Dn1 A7 Dn1 B6 Dp1 A8 SBU1 B5 CC2 A9 VBUS B4 VBUS A10 SSRXn2 B3 SSTXn2 A11 SSRXp2 B2 SSTXp2 A12 GND B1 GND 20 | About your monitor
Universal Serial Bus (USB) This section gives you information about the USB ports available on your monitor. NOTE: Up to 2 A on USB downstream port (port with battery icon) with BC 1.2 compliance devices; up to 0.9 A on the other 2 USB downstream ports; Up to 3 A on USB Type-C downstream port (port with icon) with 5 V/3 A compliance devices.
RJ45 port (connector side) Pin Signal Pin Signal 1 TD1 + 8 TD3 - 2 TD1 - 9 TD4 + 3 TD2 + 10 TD4 - 4 TD2 - 11 GREEN_ORANGE 5 CT 12 GREEN_ORANGE 6 CT 13 GREEN 7 TD3 + 14 GREEN GREEN RJ45 CABLE SIDE PHY SIDE GREEN ORANGE 2kV, 1000pF SHIELD GROUND Driver installation Install the Realtek USB GBE Ethernet Controller Driver available for your system. This is available for download at www.dell.com/support under the “Driver and download” section.
RJ45 Connector LED status: Right LED Left LED LED Color Description Right LED Amber or Green Speed indicator: • Amber On - 1000 Mbps • Green On - 100 Mbps • Off - 10 Mbps Left LED Green Link / Activity indicator: • Blinking - Activity on the port. • Green On - Link is being established. • Off - Link is not established. NOTE: RJ45 cable is non in-box standard accessory.
Plug-and-Play You can install the monitor in any Plug-and-Play-compatible system. The monitor automatically provides the computer system with its extended display identification data (EDID) using display data channel (DDC) protocols so the computer can configure itself and optimize the monitor settings. Most monitor installations are automatic; you can select different settings if desired. For more information about changing the monitor settings, see Operating the Monitor.
Ergonomics CAUTION: Improper or prolonged usage of keyboard may result in injury. CAUTION: Viewing the monitor screen for extended periods of time may result in eye strain. For comfort and efficiency, observe the following guidelines when setting up and using your computer workstation: • Position your computer so that the monitor and keyboard are directly in front of you as you work. Special shelves are commercially available to help you correctly position your keyboard.
• Vary your work activities. Try to organize your work so that you do not have to sit and work for extended periods of time. Try to stand or get up and walk around at regular intervals. • Keep the area under your desk clear of obstructions and cables or power cords that may interfere with comfortable seating or present a potential trip hazard.
Handling and moving your display To ensure the monitor is handled safely when lifting or moving it, follow the guidelines mentioned below: • Before moving or lifting the monitor, turn off your computer and the monitor. • Disconnect all cables from the monitor. • Place the monitor in the original box with the original packing materials. • Hold the bottom edge and the side of the monitor firmly without applying excessive pressure when lifting or moving the monitor.
• When lifting or moving the monitor, do not turn the monitor upside down while holding the stand base or stand riser. This may result in accidental damage to the monitor or cause personal injury. Maintenance guidelines Cleaning your monitor WARNING: Before cleaning the monitor, unplug the monitor power cable from the electrical outlet. CAUTION: Read and follow the Safety Instructions before cleaning the monitor.
Setting up the monitor Connecting the stand NOTE: The stand riser and stand base are detached when the monitor is shipped from the factory. NOTE: The following instructions are applicable only for the stand that was shipped with your monitor. If you are connecting a stand that you purchased from any other source, follow the set up instructions that were included with the stand. To attach the monitor stand: 1. Align and place the stand riser on the stand base. 2.
4. Open the protective cover on the monitor to access the VESA slot on the monitor. 5. Slide the tabs on the stand riser into the slots on the display back cover and lower the stand assembly to snap it into place.
6. Hold the stand riser and lift the monitor carefully, then place it on a flat surface. NOTE: Hold the stand riser firmly when lifting the monitor to avoid any accidental damage. 7. Lift the protective cover from the monitor.
Using the tilt, swivel, and vertical extension NOTE: The following instructions are applicable only for the stand that was shipped with your monitor. If you are connecting a stand that you purchased from any other source, follow the set up instructions that were included with the stand. Tilt, swivel and vertical extension With the stand attached to the monitor, you can tilt the monitor for the most comfortable viewing angle.
NOTE: To toggle the display setting on your Dell computer between landscape and portrait when rotating the display, download and install the latest graphics driver. To download, go to www.dell.com/support/drivers and search for the appropriate driver. NOTE: When the display is in portrait mode, you may experience performance degradation when using graphic-intensive applications such as 3D gaming.
Connecting your monitor WARNING: Before you begin any of the procedures in this section, follow the Safety Instructions. To connect your monitor to the computer: 1. Turn off your computer. 2. Connect the DisplayPort or HDMI cable, and the USB Type-C cable from your monitor to the computer. 3. Turn on your monitor. 4. Select the correct input source from the OSD Menu on your monitor and then turn on your computer. NOTE: U2421E default setting is DisplayPort 1.4. A DisplayPort 1.
Connecting the DP cable DP DP Connecting the monitor for DP Multi-Stream Transport (MST) function DP DP DP out DP NOTE: Supports the DP MST feature. To make use of this feature, your PC Graphics Card must be certified to at least DP1.2 with MST option. NOTE: Remove the rubber plug when using DP out connector.
Connecting the USB cable USB USB Connecting the USB Type-C cable USB Type-C USB Type-C The USB Type-C port on your monitor: • Can be used as USB Type-C or DisplayPort 1.4, alternatively. • Supports USB Power Delivery (PD), with profiles up to 90 W. NOTE: Regardless of the power requirement/actual power consumption of your laptop, or the remaining power runtime in your battery, the Dell U2421E monitor is designed to supply power delivery of up to 90 W to your laptop.
Connecting the monitor for USB-C Multi-Stream Transport (MST) function DP in USB Type-C DP out USB Type-C NOTE: The maximum number of supported U2421E via MST is subjected to the bandwith of the USB-C source. Please refer to “product specific problems – No image when using USB Type-C MST”. NOTE: Remove the rubber plug when using DP out connector.
Organizing your cables After attaching all necessary cables to your monitor and computer, (see Connecting Your Monitor for cable attachment) organize all cables as shown above. Securing your monitor using Kensington lock (optional) The security lock slot is located at the bottom of the monitor. (See Security lock slot) For more information on using the Kensington lock (purchased separately), see the documentation that is shipped with the lock.
Removing the monitor stand CAUTION: To prevent scratches on the LCD screen when removing the stand, ensure that the monitor is placed on a soft, clean surface. NOTE: The following instructions are applicable only for the stand that was shipped with your monitor. If you are connecting a stand that you purchased from any other source, follow the set up instructions that were included with the stand. To remove the stand: 1. Place the monitor on a soft cloth or cushion. 2.
Wall mounting (Optional) NOTE: Use M4 x 10 mm screws to connect the monitor to the wallmounting kit. Refer to the instructions that come with the VESA-compatible wall mounting kit. 1. Place the monitor on a soft cloth or cushion on a stable flat table. 2. Remove the stand. 3. Use a Phillips crosshead screwdriver to remove the four screws securing the plastic cover. 4. Attach the mounting bracket from the wall mounting kit to the monitor. 5.
Operating the monitor Power on the monitor Press the button to turn on the monitor. Using the joystick control Use the joystick control on the rear of the monitor to make OSD adjustments. 1. Press the joystick button to launch the OSD main menu. 2. Move the joystick up/down/left/right to toggle between options. 3. Press the joystick button again to confirm the settings and exit. Joystick Description • When the OSD menu is on, press the button to confirm the selection or save the settings.
Using the rear-panel controls Use the joystick control on the rear of the monitor to adjust the display settings. As you use the button to adjust the settings, an OSD shows the numeric values of each feature as they change. Display Info The following table describes the rear-panel buttons: Options Description 1 Use this Menu button to launch the on-screen display (OSD) and select the OSD menu. See Accessing the menu system Menu 2 Use this button to choose from a list of Display Info.
Using the OSD lock function You can lock the front-panel control buttons to prevent access to the OSD menu and/ or power button. Use the Lock menu to lock the button(s). 1. Select one of the following options. 2. The following message appears. 3. Select Yes to lock buttons. Once locked, pressing any control button will display the lock icon .
Use the Joystick to lock the button(s). Press the left directional navigation of Joystick for four seconds, a menu appears on the screen. Select one of the following options: Options Description 1 Select this option to lock OSD menu function. Menu Button lock 2 Power Button lock 3 Use this option to lock power button. This will prevent the user to turn off the monitor using the power button. Use this option to lock OSD menu and power button to turn off the monitor.
To unlock the button(s). Press the left directional navigation of Joystick for four seconds until a menu appears on the screen. The following table describes the options to unlock the front-panel control buttons. Options Description 1 Use this option to unlock OSD menu function. Menu Button unlock 2 Use this option to unlock power button to turn off the monitor. Power Button unlock 3 Use this option to unlock OSD menu and power button to turn off the monitor.
Front‑panel button Use the buttons on the front of the monitor to adjust the image settings. Front Panel Description 1 Use the Up (increase) and Down (decrease) buttons to adjust items in the OSD menu. Up Down 2 Use the Previous button to go back to the previous menu. Previous 3 Use the Next button to confirm your selection. Next 4 Use the Tick button to confirm your selection.
Using the On-Screen Display (OSD) Menu Accessing the menu system Icon Menu and Submenus Brightness/ Contrast Description Brightness Brightness adjusts the luminance of the backlight (minimum 0; maximum 100). Move the joystick up to increase brightness. Move the joystick down to decrease brightness. Contrast Adjust the Brightness first, and then adjust Contrast only if further adjustment is necessary.
Icon Menu and Submenus Input Source Description Use the Input Source menu to select between different video inputs that are connected to your monitor. USB-C 90 W Select USB-C 90 W input when you are using the USB-C 90 W connector. Press the joystick button to confirm the selection. DP Select DP input when you are using the DP (DisplayPort) connector. Press the joystick button to confirm the selection. HDMI Select the HDMI input when you are using the HDMI connector.
Icon Menu and Submenus Color Description Preset Modes When you select Preset Modes, you can choose Standard, Movie, Game, Color Temp. or Custom Color from the list. Use the Color menu to adjust the color setting mode. • Standard: Default Color setting, This monitor uses a low blue light panel, and is certified by TUV to reduce blue light output and create a more relaxing and less stimulating image while reading content on the screen. • Movie: Ideal for movies.
Icon Menu and Submenus Input Color Format Description Hue Use joystick up or down to adjust the hue from 0 to 100. NOTE: Hue adjustment is available only for Movie and Game mode. Use joystick up or down to adjust the saturation from 0 to 100. NOTE: Saturation adjustment is available only for Movie and Game mode. Resets your monitor’s color settings to the factory defaults.
Icon Menu and Submenus Display Description Aspect Ratio Adjust the image ratio to Wide 16:10, 4:3, 5:4. Sharpness Makes the image look sharper or softer. Move the joystick up and down to adjust the sharpness from ‘0’ to ‘100’. Allows you to set the Response Time to Normal or Fast. Response Time MST Reset Display Use the Display menu to adjust image. DP Multi Stream Transport, Set to ON enables MST(DP out), Set to OFF disables MST function.
Icon Menu and Submenus Menu Description Language Set the OSD display to one of eight languages. (English, Spanish, French, German, Brazilian Portuguese, Russian, Simplified Chinese, or Japanese). Rotates the OSD by 0/90/180/270 degrees. You can adjust the menu according to your display rotation. Rotation Transparency Timer 52 | Select this option to adjust the settings of the OSD, such as the languages of the OSD, the amount of time the menu remains on screen, and so on.
Icon Menu and Submenus Lock Reset Menu Description With the control buttons on the monitor locked, you can prevent people from accessing the controls. It also prevents accidental activation in multiple monitors side-by-side setup. • Menu Buttons: Through OSD to lock the Menu buttons. • Power Button: Through OSD to lock the Power button. • Menu + Power Buttons: Through OSD to lock the all of Menu and Power buttons. • Disable: Move the Joystick left and hold for 4 sec.
Icon Menu and Submenus Personalize Description Shortcut key 1 Shortcut key 2 Shortcut key 3 Shortcut key 4 Shortcut key 5 Power Button LED USB-C Charging 90 W Other USB Charging Reset Personalization 54 | Select from Preset Modes, Brightness/Contrast, Input Source, Aspect Ratio, Rotation, Display Info set as shortcut key. Allows you to set the state of the power light to save energy. Allows you to enable or disable USB-C Charging charging function during monitor power off mode.
Icon Menu and Submenus Others Display Info DDC/CI Description Select this option to adjust the OSD settings such as the DDC/CI, LCD conditioning, and so on. Displays the monitor’s current settings. DDC/CI (Display Data Channel/Command Interface) allows your monitor parameters (brightness, color balance, and etc.) to be adjustable via the software on your computer. You can disable this feature by selecting Off. Enable this feature for best user experience and optimum performance of your monitor.
Icon Menu and Submenus LCD Conditioning Description Firmware Service Tag Displays the firmware version of your monitor. Displays the Service Tag. The Service Tag is a unique alphanumeric identifier that allows Dell to identify the product specifications and access warranty information. NOTE: The Service Tag is also printed on a label located at the back of the cover. Resets all settings under the Others menu to the factory defaults. Restores all preset values to the factory default settings.
OSD warning messages When the monitor does not support a particular resolution mode, you can see the following message: This means that the monitor cannot synchronize with the signal that it is receiving from the computer. See Monitor Specifications for the Horizontal and Vertical frequency ranges addressable by this monitor. Recommended mode is 1920 x 1200.
A message is displayed while the cable supporting DP alternate mode is connected to the monitor under the following conditions: • When Auto Select for USB-C is set to Prompt for Multiple Inputs. • When the USB-C cable is connected to the monitor.
Select OSD items of On in Standby Mode message will appear: in Personalize feature, the following If adjust the Brightness level above the default level over 75%, the following message will appear: • When user selects “Yes”, the power message is displayed only once. • When user select ‘No’, the power warning message will pop-up again. • The power warning message will appear again only when the user does a Factory Reset from the OSD menu.
If either USB Type-C, DP, HDMI input is selected and the corresponding cable is not connected, a floating dialog box as shown below appears. or or See Troubleshooting for more information.
Setting the maximum resolution To set the maximum resolution for the monitor: In Windows 7, Windows 8 or Windows 8.1: 1. For Windows 8 or Windows 8.1 only, select the Desktop tile to switch to classic desktop. For Windows Vista and Windows 7, skip this step. 2. Right-click on the desktop and click Screen Resolution. 3. Click the Dropdown list of the Screen Resolution and select 1920 x 1200. 4. Click OK. In Windows 10: 1. Right-click on the desktop and click Display Settings. 2.
Troubleshooting WARNING: Before you begin any of the procedures in this section, follow the Safety Instructions. Self-test Your monitor provides a self-test feature that allows you to check whether your monitor is functioning properly. If your monitor and computer are properly connected but the monitor screen remains dark, run the monitor self-test by performing the following steps: 1. Turn off both your computer and the monitor. 2. Unplug the video cable from the back of the computer.
5. Turn off your monitor and reconnect the video cable; then turn on both your computer and the monitor. If your monitor screen remains blank after you use the previous procedure, check your video controller and computer, because your monitor is functioning properly. Built-in diagnostics Your monitor has a built-in diagnostic tool that helps you determine if the screen abnormality you are experiencing is an inherent problem with your monitor, or with your computer and video card.
Common Problems The following table contains general information about common monitor problems you might encounter and the possible solutions: Common Symptoms No Video/ Power LED off What You Experience No picture No Video/ Power LED on No picture or no brightness Missing Pixels LCD screen has spots Stuck-on Pixels LCD screen has bright spots Brightness Problems Safety Related Issues 64 | Picture too dim or too bright Visible signs of smoke or sparks Troubleshooting Possible Solutions • Ensur
Common Symptoms Intermittent Problems What You Possible Solutions Experience Monitor • Ensure that the video cable connecting the malfunctions on monitor to the computer is connected properly & off 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 • Perform monitor self-test.
Problem Cannot adjust the monitor with the buttons on the front panel No Input Signal when user controls are pressed What you experience OSD does not appear on the screen Possible solutions 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. Connect the signal cable again, if necessary. • Reset the computer or video player.
Problem No charging when using USB Type-C connection to computer, laptop, and so on Intermittent charging when using USB Type-C connection to computer, laptop, and so on No image when using DP connection to the PC What you experience No charging Intermittent charging Possible solutions • Verify if the device can support one of 5 V/9 V/15 V/20 V charging profiles. • Verify if the Notebook requires a >90 W power adaptor.
Problem What you experience The LAN port is OS setting not functioning or cable connection issue Possible solutions • Ensure that the latest BIOS and drivers for your computer are installed on your computer. • Ensure that the RealTek Gigabit Ethernet Controller is installed in the Windows Device Manager. • If your BIOS Setup has a LAN/GBE Enabled/ Disabled option, make sure it is set to Enabled. • Ensure that the Ethernet cable is connected securely on the monitor and the hub/router/ firewall.
Specific Symptoms SuperSpeed USB 3.2 Gen 1 interface is slow. What You Experience SuperSpeed USB 3.2 Gen 1 peripherals working slowly or not working at all 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 No USB functionalities USB is not working Possible Solutions • Check that your computer is USB 3.0-capable. • Some computers have USB 3.0, USB 2.0, and USB 1.
Appendix FCC notices (U.S. only) and other regulatory information For FCC notices and other regulatory information, see the regulatory compliance website located at www.dell.com/regulatory_compliance. Contacting Dell For customers in the United States, call 800-WWW-DELL (800-999-3355). EU product database for energy label and product information sheet U2421E: https://eprel.ec.europa.
