Dell UltraSharp 25 USB-C Monitor U2520D/U2520DR User’s Guide Model: U2520D/U2520DR Regulatory model: U2520Db
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 About your monitor . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Product features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Identifying parts and controls . . . . . . . . . . . . . . . . . . . . . . 9 Front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Back view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Attaching the stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Connecting your monitor . . . . . . . . . . . . . . . . . . . . . . . . . 31 Connecting the DisplayPort (DisplayPort to DisplayPort) cable (for U2520D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Connecting the HDMI cable (for U2520DR) . . . . . . . . . . . . . . . . . 32 Connecting the USB Type-C cable . . . . . . . . . . . . . . . . . . . . . . . .
Built-in diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Setting USB-C Prioritization when USB-C Charging is set to On During Power Off . . . . . . . . . . . . . . . . . . . . . . . Common problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Product specific problems . . . . . . . . . . . . . . . . . . . . . . . . Universal Serial Bus (USB) specific problems . . . . . . . . . 67 68 69 72 73 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
About your monitor Package contents Your monitor ships with the components shown in the table below. If any component is missing, contact Dell technical support. For more information, see Contact Dell. NOTE: Some items may be optional and may not ship with your monitor. Some features may not be available in certain countries. NOTE: If you are attaching a stand that you purchased from any other source, follow the set up instructions that were included with the stand.
Power cable (varies by country) DisplayPort cable (DisplayPort to DisplayPort, for U2520D) HDMI cable (for U2520DR) USB Type-C cable (enables the USB ports on the monitor) USB Type-C to Type-A cable (enables the USB ports on the monitor) • Quick Setup Guide • Factory calibration report • Safety, Environmental, and Regulatory Information About your monitor │ 7
Product features The Dell U2520D/U2520DR monitor has an active matrix, Thin-Film Transistor (TFT), Liquid Crystal Display (LCD) and LED backlight. The monitor features include: • 63.44 cm (25 in.) viewable area (measured diagonally). 2560 x 1440 (16:9) resolution, plus full-screen support for lower resolutions. • Wide viewing angle to allow viewing from a sitting or standing position. • Color gamut of 99% sRGB with an average Delta E < 2. • Digital connectivity with DisplayPort, USB Type-C and HDMI.
Identifying parts and controls Front view Front panel controls Label Description 1 Function buttons (For more information, see Operating the monitor) 2 Power On/Off button (with LED indicator) About your monitor │ 9
Back view Back view with monitor stand Label Description Use 1 VESA mounting holes (100 mm x 100 mm - behind attached VESA Cover) Wall mount monitor using VESAcompatible wall mount kit (100 mm x 100 mm). 2 Regulatory label Lists the regulatory approvals. 3 Stand release button Releases stand from the monitor. 4 Barcode, serial number, and Service Tag label Refer to this label if you need to contact Dell for technical support.
Side view Label Description Use 1 USB downstream port with Power Charging Connect to charge your device. 2 USB Type-C port Connect your USB device.* NOTE: To use these ports, you must connect the USB Type-C cable (shipped with your monitor) to the USB Type-C upstream port on the monitor and to your computer. *To avoid signal interference, when a wireless USB device has been connected to a USB downstream port, it is NOT recommended to connect any other USB devices to the adjacent port(s).
Bottom view Bottom view without monitor stand Label Description Use 1 Power connector Connect the power cable (shipped with your monitor). 2 Security lock slot Secures the monitor with security lock (security lock not included). 3 HDMI port Connect your computer with the HDMI cable (shipped with U2520DR). 4 DisplayPort (in) Connect your computer with the DisplayPort cable (shipped with U2520D).
7 DisplayPort (out) DisplayPort output for MST (multi-stream transport) capable monitor. To enable MST, see “Connecting the monitor for DP MultiStream Transport (MST) function”. NOTE: Remove the rubber plug when using DisplayPort out connector. 8 Audio line-out port Connect your speakers.* 9 USB downstream port (2) Connect your USB device.** NOTE: To use this port, you must connect the USB Type-C cable (shipped with your monitor) to the USB Type-C upstream port on the monitor and to your computer.
Monitor specifications Model U2520D/U2520DR Screen type Active matrix - TFT LCD Panel technology In-Plane Switching Technology Aspect ratio 16:9 Viewable image Diagonal 634.4 mm (25 in.) Width (active area) 553.0 mm (21.77 in.) Height (active area) 311.0 mm (12.24 in.) Total area 171983.0 mm2 (266.57 in.2) Pixel pitch 0.216 mm x 0.216 mm Pixel per inch (PPI) 117.
Connectivity • 1 x DisplayPort version 1.4 • 1 x DisplayPort (Out) with MST • 1 x HDMI port version 2.0 • 1 x USB Type-C (Alternate mode with DisplayPort 1.4, Power Delivery PD up to 90 W))* • 1 x USB Type-C downstream port with charging capability at 3 A (maximum) • 1 x USB 3.0 with BC1.2 charging capability at 2 A (maximum) • 2 x USB 3.0 downstream port • 1 x audio line-out port Border width (edge of monitor to active area) 7.3 mm (Top) 7.4 mm (Left/Right) 9.
Resolution specifications Model U2520D/U2520DR Horizontal scan range 10 kHz to 120 kHz (automatic) Vertical scan range 48 Hz to 75 Hz (automatic) Maximum preset resolution 2560 x 1440 at 60 Hz Supported video modes Model U2520D/U2520DR Video display capabilities (HDMI 480p, 480i, 576p, 576i, 720p, 1080i, 1080p, & DisplayPort & USB Type-C QHD alternate mode) Preset display modes Horizontal frequency (kHz) Vertical frequency (Hz) Pixel clock (MHz) Sync polarity (Horizontal /Vertical) 720 x 400
VESA, 2048 x 1080 66.58 60.00 147.16 +/- VESA, 2560 x 1440 88.80 60.00 241.50 +/- Multi-Stream Transport (MST) modes MST Source Monitor Maximum number of external monitor that can be supported 2560 x 1440 at 60 Hz 2560 x 1440 at 60 Hz • 3 (Use USB Type-C) • 3 (Use DisplayPort) Electrical specifications Model U2520D/U2520DR Video input signals HDMI 2.0*/DisplayPort 1.
3 Pon: Power consumption of On mode as defined in Energy Star 8.0 version. TEC: Total energy consumption in kWh as defined in Energy Star 8.0 version. This document is informational only and reflects laboratory performance. Your product may perform differently, depending on the software, components and peripherals you ordered and shall have no obligation to update such information. Accordingly, the customer should not rely upon this information in making decisions about electrical tolerances or otherwise.
Dimensions (without stand) Height 332.1 mm (13.07 in.) Width 567.7 mm (22.35 in.) Depth 49.9 mm (1.96 in.) Stand dimensions Height (extended) 418.4 mm (16.47 in.) Height (compressed) 371.0 mm (14.61 in.) Width 245.0 mm (9.65 in.) Depth 185.0 mm (7.28 in.) Base 245 mm x 185 mm (9.65 in. x 7.28 in.) Weight Weight with packaging 8.8 kg (19.40 lb) Weight with stand assembly and cables 6.4 kg (14.
Environmental characteristics Model U2520D/U2520DR Compliant standards • ENERGY STAR certified monitor • EPEAT registered where applicable. EPEAT registration varies by country. See www.epeat.net for registration status by country.
Pin assignments DisplayPort connector (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 GND 14 GND 15 AUX (p) 16 GND 17 AUX (n) 18 Hot Plug Detect 19 Re-PWR 20 +3.
DisplayPort connector (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 22 │ About your monitor
HDMI connector 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.
Plug and play capability 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 that the system 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.
USB 3.
A9 VBUS B9 VBUS A10 RX2- B10 RX1- A11 RX2+ B11 RX1+ A12 GND B12 GND USB ports • 1 USB Type-C upstream - bottom • 1 USB Type-C downstream - side • 3 downstream - bottom (2) and side (1) Power Charging Port - the port with battery icon; supports up to 2 A fast-charging capability if the device is BC1.2 compatible. NOTE: USB 3.0 functionality requires a USB 3.0-capable computer. NOTE: The USB ports on the monitor work only when the monitor is turned On or in Standby mode.
• Use a lightly-dampened, warm cloth to clean the monitor. Avoid using detergent of any kind as some detergents leave a milky film on the monitor. • If you notice white powder when you unpack your monitor, wipe it off with a cloth. • Handle your monitor with care as a darker-colored monitor may get scratched and show white scuff marks more than a lighter-colored monitor.
Setting up the monitor Attaching the stand NOTE: The stand is not installed at the factory when shipped. NOTE: The following instructions are applicable only for attaching the stand that was shipped with your monitor. If you are attaching 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. Follow the instructions on the flaps of carton to remove the stand from the top cushion that secures it. 2.
6. Lift the cover, as shown, to access the VESA area for stand assembly. 7. Attach the stand assembly to the monitor. a. Fit the two tabs on the upper part of the stand to the groove on the back of the monitor. b. Press the stand down till it snaps into place.
8. Place the monitor upright. NOTE: Lift the monitor carefully to prevent it from slipping or falling. 9. Remove the cover from the monitor.
Connecting your monitor WARNING: Before you begin any of the procedures in this section, follow the Safety instructions. NOTE: Dell monitors are designed to work optimally with Dell supplied inbox cables. Dell does not guarantee the video quality and performance when using non-Dell cables. NOTE: Route the cables through the cable-management slot before connecting them. NOTE: Do not connect all cables to the computer at the same time. NOTE: The graphics are used for the purpose of illustration only.
• Use the and buttons to highlight DP. button for approximately 10 seconds, and the • Press and hold the DisplayPort configuration message appears. • Use the button to select Disable and change the settings. Repeat the above steps to change the DisplayPort format settings if necessary. Connecting the HDMI cable (for U2520DR) NOTE: The default out of factory setting is HDMI 2.0.
• Use the button to select Enable and change the settings. Repeat the above steps to change the HDMI format settings if necessary. Connecting the USB Type-C cable NOTE: Use the USB Type-C cable shipped with monitor only. • • • This port supports DisplayPort Alternate Mode (DP1.4 standard only). The USB Type-C power delivery compliant port (PD Version 3.0) delivers up to 90 W of power.
Connecting the monitor for DP Multi-Stream Transport (MST) function NOTE: This monitor supports the DP MST feature. To make use of this feature, your PC Graphics Card must be certified to DP1.2 with MST option. NOTE: Remove the rubber plug when using DP out connector. Connecting the monitor for USB-C Multi-Stream Transport (MST) function NOTE: The maximum number of supported monitors via MST is subjected to the bandwidth of the USB-C source. 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. Removing the monitor stand NOTE: 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 attaching the stand that was shipped with your monitor.
VESA wall mounting (optional) (Screw dimension: M4 x 10 mm). Refer to the instructions that come with the VESA-compatible wall mounting kit. 1. Place the monitor panel on a soft cloth or cushion on a stable flat table. 2. Remove the stand. (See Removing the monitor 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. Mount the monitor on the wall.
Operating the monitor Power on the monitor Press the Power button to turn On the monitor. Using the front-panel controls Use the control buttons on the front of the monitor to adjust settings. The following table describes the front-panel buttons: Front-panel button 1 Description Use this button to choose from a list of preset color modes. Shortcut key/ Preset Modes 2 Use this button to choose from a list of video signals that may be connected to your monitor.
Use the MENU button to launch the On-Screen Display (OSD). See Accessing the menu system. 3 Menu Use this button to exit the OSD main menu. 4 Exit 5 To turn the monitor on or off. Power (with power light indicator) Solid white light indicates that the monitor is turned on and functioning normally. Blinking white light indicates that the monitor is in Standby Mode. Front-panel button Use the buttons on the front of the monitor to adjust the image settings.
Using the On-Screen Display (OSD) menu Accessing the menu system NOTE: If you change the settings and then either proceed to another menu or exit the OSD menu, the monitor automatically saves those changes. The changes are also saved if you change the settings and then wait for the OSD menu to disappear. 1. Press the button to launch the OSD menu and display the main menu. 2. Press the and buttons to move between the setting options. As you move from one icon to another, the option name is highlighted.
Icon Menu and Submenus Description Brightness/ Contrast Use this menu to activate Brightness/Contrast adjustment. Brightness Brightness adjusts the luminance of the backlight. Press the button to increase the brightness and button to decrease the brightness (min. press the 0 / max. 100). NOTE: Manual adjustment of Brightness is disabled when Smart HDR is activated. Contrast Adjusts the Brightness first, and then adjust the Contrast only if further adjustment is necessary.
Input Source Use the Input Source menu to select between the different video signals that may be connected to your monitor. USB Type-C Select the USB Type-C input when you are using the USB Type-C connector. Press the confirm the selection. DP Select the DP input when you are using the DisplayPort (DP) connector. Press the confirm the selection. HDMI button to Select the HDMI input when you are using the HDMI connector. Press the selection.
Auto Select for USB-C Allows you to set Auto Select for USB-C to: • Prompt for Multiple Inputs: Always displays the “Switch to USB-C Video Input” message for you to choose whether to switch or not. • Yes: Always switches to USB-C video input (without asking) when the USB Type-C cable is connected. • No: Never automatically switches to USB-C video input when the USB Type-C cable is connected. NOTE: Auto Select for USB-C is available only when Auto Select is on.
Preset Modes Allows you to choose from a list of preset color modes. • Standard: Loads the monitor's default color settings. This is the default preset mode. • ComfortView: Decreases the level of blue light emitted from the screen to make viewing more comfortable for your eyes. WARNING: The possible long-term effects of blue light emission from the monitor may cause personal injury such as digital eye strain, eye fatigue and damage to the eyes.
Preset Modes 4. Look away from your monitor and gaze at a distant object at 20 feet away for at least 20 seconds during the breaks. 5. Perform stretches to relieve tension in the neck, arm, back, and shoulders during the breaks. • Movie: Loads color settings ideal for movies. • Game: Loads color settings ideal for most gaming applications. • Color Temp.: Allows you to select the color temperature: 5000K, 5700K, 6500K, 7500K, button to 9300K, and 10000K. Press the confirm the selection.
Input Color Format Allows you to set the video input mode to: • RGB: Select this option if your monitor is connected to a computer (or media player) using the USB Type-C, DisplayPort, or HDMI cable. • YPbPr: Select this option if your media player supports only YPbPr output. Press the Hue button to confirm the selection. This feature can shift the color of the video image to green or purple. This is used to adjust the desired or flesh tone color. Use '0' to '100'.
Display Use the Display menu to adjust images. U2520D U2520DR Aspect Ratio Sharpness Adjusts the image ratio to Wide 16:9, Auto Resize, or 4:3. This feature can make the image look sharper or softer. Use '100'. Response Time or to adjust the sharpness from '0' to Allows you to set the Response Time to Normal or Fast.
MST DisplayPort Multi Stream Transport. The default setting is Off. To enable MST (DP out), select On. NOTE: When the DisplayPort/USB Type-C upstream cable and the DP downstream cable are connected, the monitor will automatically set MST to On. This action will only be done once after Factory Reset or Reset Display is selected.
Smart HDR The Smart HDR (High Dynamic Range) feature enhances the display output by optimally adjusting contrast and the ranges of color and luminosity to resemble true-to-life visuals. The default setting is Off. You may set the Smart HDR mode to: • Desktop: Suitable for using the monitor with a desktop computer. • Movie HDR: Suitable for the playback of HDR video content. • Game HDR: Suitable for playing HDR-compatible games.
Menu 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. Language Sets the OSD display to one of the eight languages (English, Spanish, French, German, Brazilian Portuguese, Russian, Simplified Chinese, or Japanese). Rotation Rotates the OSD by 90 degrees counter-clockwise and anticounter-clockwise. You can adjust the menu according to your Display Rotation.
Lock 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: All Menu/function buttons (except the Power button) are locked and not accessible by the user. • Power Button: Only the Power button is locked and not accessible by the user. • Menu + Power Buttons: Both the Menu/ function & Power buttons are locked and not accessible by the user.
Personalize U2520D U2520DR Shortcut Key 1 Shortcut Key 2 Allows you to choose a feature from Preset Modes, Brightness/Contrast, Input Source, Aspect Ratio, Smart HDR, or Rotation and set it as a shortcut key. Power Button LED Allows you to set the power LED indicator on or off to save energy. USB-C Charging 90W Allows you to enable or disable the Always On USB Type-C Charging function during monitor Power Off mode.
Other USB Charging Allows you to enable or disable USB Type-A and USB Type-C Downstream Ports charging function during monitor standby mode. NOTE: This option is only available when the USB Type-C (Upstream Port) cable is unplugged. If the USB Type-C cable is connected, Other USB Charging follows the USB host power status and the option is not accessible. Resets all settings under the Personalize menu to Reset Personalization the factory preset values.
DDC/CI 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. LCD Conditioning Helps reduce minor cases of image retention. Depending on the degree of image retention, the program may take some time to run. You can enable this feature by selecting On.
Reset Others Resets all settings under the Others menu to the factory preset values. Factory Reset Restore all preset values to the factory default settings. These are also the settings for ENERGY STAR® tests. OSD warning message When the monitor does not support a particular resolution mode, you will see the following message: This means that the monitor cannot synchronize with the signal that it is receiving from the computer.
(For U2520D) When you adjust the Brightness level above the default level for the first time, the following message appears: NOTE: If you select Yes, the message will not appear next time when you intend to change the Brightness setting.
You will see the following message before the Lock function is activated: NOTE: The message may be slightly different according to the selected settings. (For U2520D) When the monitor goes into Standby mode, the following message appears: (For U2520DR) When the monitor goes into power-save mode, the following message appears: Activate the computer and wake up the monitor to gain access to the OSD. NOTE: The message may be slightly different according to the connected input signal.
The OSD functions only in the normal operation mode. If you press any button other than the power button during the Standby mode, the following message will appear depending on the selected input: Activate the computer and the monitor to gain access to the OSD. NOTE: The message may be slightly different according to the connected input signal.
NOTE: The message may be slightly different according to the connected input signal.
When the MST function is on and USB-C Prioritization is set to High Resolution, if Factory Reset is selected, the following message appears: or When Yes is selected, the following message appears: Operating the monitor │ 59
When the USB-C Charging 90W function is set to On in Off Mode (for U2520D) / On During Power Off (for U2520DR), if you change the current setting for USB-C Prioritization, the following message appears: See Troubleshooting for more information. Setting the maximum resolution To set the maximum resolution for the monitor: In Windows® 7, Windows® 8, and Windows® 8.1: 1. For Windows® 8 and Windows® 8.1 only, select the Desktop tile to switch to classic desktop. 2.
Requirements to view or playback HDR content (1) via Ultra BluRay DVD or Game consoles Ensure the DVD player and Game consoles are HDR capable, e.g. Panasonic DMP-UB900, x-Box One S, PS4 Pro. Download and install the appropriate graphics card drivers (for PC applications), see below. (2) via PC Ensure the graphics card used is HDR capable, i.e., HDMI2.0a (with HDR option) compliant and HDR graphics driver is installed. HDR capable player application must be used, e.g.
Using the tilt, swivel, and vertical extension NOTE: The following instructions are applicable only for attaching the stand that was shipped with your monitor. If you are attaching a stand that you purchased from any other source, follow the set up instructions that were included with the stand. Tilt, swivel With the stand attached to the monitor, you can tilt and swivel the monitor for the most comfortable viewing angle. NOTE: The stand is not installed at the factory when shipped.
Vertical extension NOTE: The stand extends vertically up to 130 mm. The figure below illustrates how to extend the stand vertically. Rotating the monitor Before you rotate the monitor, your monitor should be fully vertically extended (Vertical extension) and fully tilted up to avoid hitting the bottom edge of the monitor.
Rotate clockwise Rotate counterclockwise NOTE: To use the Display Rotation function (Landscape versus Portrait view) with your Dell computer, you require an updated graphics driver that is not included with this monitor. To download the graphics driver, go to www.dell.com/support and see the Download section for Video Drivers for latest driver updates. NOTE: When in the Portrait View Mode, you may experience performance degradation in graphic-intensive applications (3D Gaming and etc.).
Adjusting the rotation display settings of your system After you have rotated your monitor, you need to complete the procedure below to adjust the Rotation Display Settings of your system. NOTE: If you are using the monitor with a non-Dell computer, you need to go the graphics driver website or your computer manufacturer website for information on rotating the 'contents' on your display. To adjust the Rotation Display Settings: 1. Right-click on the desktop and click Properties. 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. 3.
4. This box also appears during normal system operation, if the video cable becomes disconnected or damaged. 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.
Setting USB-C Prioritization when USB-C Charging is set to On During Power Off If USB-C Charging is set to On in Off Mode (for U2520D) / On During Power Off (for U2520DR), the monitor allows you to specify the USB-C Prioritization settings only when your PC is powered off. 1. Ensure that your PC is powered off. 2. Press any control button other than the power button to display the shortcut menu of Input Source. 3. Use the or button to highlight USB Type-C. 4.
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 Possible solutions • 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.
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/support/monitors. 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.
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.
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.
No video at HDMI/ When connected to • Unplug the HDMI/DisplayPort/USB DisplayPort/USB some dongle/ Type-C cable from dongle/docking docking device at Type-C port device, then plug the docking the port, there is no Thunderbolt cable to the notebook. video when Plug the HDMI/DisplayPort/USB unplugging/plugging Type-C cable 7 seconds later.
Super Speed USB Super Speed USB • Check that your computer is USB 3.03.0 interface is 3.0 peripherals capable. slow working slowly or • Some computers have USB 3.0, USB not working at all 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.
Appendix WARNING: 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. For information on safety instructions, see Safety, Environmental, and Regulatory Information (SERI). 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.
