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Dell UltraSharp U2421HE User Manual
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Dell UltraSharp U2421HE User Manual

24/27 usb-c hub monitor
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Dell UltraSharp 24/27
USB-C Hub Monitor - U2421HE/U2721DE
User's Guide
Model: U2421HE/U2721DE
Regulatory model: U2421HEt/U2721DEt

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Summary of Contents for Dell UltraSharp U2421HE

  • Page 1 Dell UltraSharp 24/27 USB-C Hub Monitor - U2421HE/U2721DE User’s Guide Model: U2421HE/U2721DE Regulatory model: U2421HEt/U2721DEt...
  • Page 2 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.

  • Page 3: Table Of Contents

    Contents About Your Monitor ....... . .5 Package Contents ......5 Product Features .
  • Page 4 FCC Notices (U.S. only) and Other Regulatory Information ..59 Contacting Dell ....... .59 Setting Up Your Monitor .

  • Page 5: About Your Monitor

    Package Contents Your monitor ships with the components shown below. Make sure that you have received all the components and contact Dell if something is missing. NOTE: Some items may be optional and may not ship with your monitor. Some features or media may not be available in certain countries.

  • Page 6: Product Features

    Calibrations were done according to Dell approved test procedures using calibrated equipment at the factory production line. This Report is provided only with and for this new Dell U2421HE UltraSharp monitor. Results may vary with other test equipment, setups and test patterns. Please retain this Report for your reference as Dell is unable to reproduce it or provide a duplicate.

  • Page 7: Identifying Parts And Controls

    Identifying Parts and Controls Front view Label Description Function buttons (For more information, see Operating the Monitor) Power on/off button (with LED indicator) About Your Monitor...
  • Page 8 Security lock slot Secures monitor with security cable lock (sold separately). Barcode, serial number, and Service Refer to this label if you need to contact Dell Tag label for technical support. Cable management slot Use to organize cables by placing them through the slot.
  • Page 9 Bottom View 2 3 4 5 6 Label Description AC power port To connect the monitor power cable. HDMI port Connect your computer with HDMI cable (optional). DP port (in) Connect your computer with DP cable. USB Type-C/DisplayPort Connect to your computer using the USB Type-C cable.

  • Page 10: Monitor Specifications

    Monitor Specifications Model U2421HE U2721DE Screen type Active matrix - TFT LCD Active matrix - TFT LCD Panel Type In-plane switching Technology In-plane switching Technology Aspect ratio 16:9 16:9 Viewable image dimensions Diagonal 60.47 cm (23.8 in.) 68.47 cm (27 in.) Active Area Horizontal 527.04 mm (20.75 in.)
  • Page 11 Tilt -5° to 21° -5° to 21° Swivel -40° to 40° -40° to 40° Cable management Dell Display Manager Easy Arrange Easy Arrange (DDM)Compatibility and other key features and other key features Security Security lock slot (cable lock Security lock slot (cable lock...
  • Page 12 Preset Display Modes U2421HE Display Mode Horizontal Vertical Pixel Clock Sync Polarity Frequency Frequency (MHz) (Horizontal/ (kHz) (Hz) Vertical) 720 x 400 31.5 70.0 28.3 VESA, 640 x 480 31.5 60.0 25.2 VESA, 640 x 480 37.5 75.0 31.5 VESA, 800 x 600 37.9 60.3 40.0...
  • Page 13 DP MST Multi-Stream Transport (MST) Modes U2421HE MST Source Monitor Maximum number of external monitors that can be supported 1920 x 1080/60 Hz 1920 x 1080/60 Hz NOTE: Maximum external monitor resolution supported is 1920 x 1080 60 Hz only. U2721DE MST Source Monitor Maximum number of external monitors that can be...
  • Page 14 Electrical Specifications Model U2421HE/U2721DE Video input signals • Digital video signal for each differential line Per differential line at 100 ohm impedance • DP/USB Type-C signal input support Input voltage/ frequency/current 100-240 VAC / 50 or 60 Hz ± 3 Hz / 1.8 A (maximum) Inrush current 120 V: 30 A (Max.) 240 V: 60 A (Max.)
  • Page 15 Width 218.0 mm (8.58 in.) 230.0 mm (9.06 in.) Depth 165.0 mm (6.50 in.) 180.0 mm (7.09 in.) Weight Weight with packaging 7.55 kg (16.64 lb) 8.72 kg (19.22 lb) Weight with stand assembly 5.32 kg (11.73 lb) 6.24 kg (13.75 lb) and cables Weight without stand 3.37 kg (7.43 lb)
  • Page 16 Power Management Modes If you have VESA’s DPM-compliant video card or software installed in your PC, the monitor can automatically reduce its power consumption when not in use. This is referred to as power save mode*. If the computer detects input from the keyboard, mouse, or other input devices, the monitor automatically resumes functioning.
  • Page 17 The OSD operates only in the normal operation mode. If you press any button in the active- off mode, the following message is displayed: Dell UltraSharp 24/27 Monitor No DP signal from your device. Press any key on the keyboard or move the mouse or wake it up.
  • Page 18 Pin Assignments DP port (in) Pin number 20-pin side of the connected signal cable ML3(n) ML3(p) ML2(n) ML2(p) ML1(n) ML1(p) ML0(n) ML0(p) CONFIG1 CONFIG2 AUX CH (p) AUX CH (n) Hot Plug Detect Return DP_PWR About Your Monitor...
  • Page 19 DP port (out) Pin number 20-pin side of the connected signal cable ML0(p) ML0(n) ML1(p) ML1(n) ML2(p) ML2(n) ML3(p) ML3(n) CONFIG1 CONFIG2 AUX CH(p) AUX CH(n) Hot Plug Detect Return DP_PWR About Your Monitor...
  • Page 20 HDMI port Pin number 19-pin side of the connected signal cable TMDS DATA 2+ TMDS DATA 2 SHIELD TMDS DATA 2- TMDS DATA 1+ TMDS DATA 1 SHIELD TMDS DATA 1- TMDS DATA 0+ TMDS DATA 0 SHIELD TMDS DATA 0- TMDS CLOCK+ TMDS CLOCK SHIELD TMDS CLOCK-...
  • Page 21 USB Type-C port Signal Signal SSTXp1 SSRXp1 SSTXn1 SSRXn1 VBUS VBUS SBU2 SBU1 VBUS VBUS SSRXn2 SSTXn2 SSRXp2 SSTXp2 About Your Monitor...
  • Page 22 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. Your computer has the following USB ports: • 4 downstream - 2 at left side, 2 at bottom Power Charging Port - the ports with...
  • Page 23 RJ45 port (connector side) Signal Pin Signal GREEN RJ45 TD1 + TD3 - CABLE SIDE PHY SIDE TD1 - TD4 + TD2 + TD4 - TD2 - GREEN_ORANGE GREEN_ORANGE GREEN GREEN ORANGE 2kV, 1000pF TD3 + GREEN SHIELD GROUND Support OS Version Windows Win7 (LAN driver V7.48)

  • Page 24: Plug-And-Play

    During the LCD monitor manufacturing process, it is not uncommon for one or more pixels to become fixed in an unchanging state which are hard to see and do not affect the display quality or usability. For more information on LCD Monitor Pixel Policy, see Dell support site at: www.dell.com/support/monitors.

  • Page 25: Setting Up The Monitor

    Setting Up the Monitor Attaching the Stand NOTE: The stand riser and stand base are detached when the monitor is shipped from the factory. NOTE: The procedure below is applicable for the default stand. If you purchased any other stand, see the documentation shipped with the stand to set it up. CAUTION: Place monitor of a flat, clean, and soft surface to avoid scratching the display panel.
  • Page 26 1 Remove the monitor protective cover and place the monitor with its front facing downward on it. 2 Insert the two tabs on the upper part of the stand to the groove on the back of the monitor. 3 Press the stand down till it snaps into its place. Setting Up the Monitor...

  • Page 27: Using The Tilt, Swivel, And Vertical Extension

    90° 90° 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.

  • Page 28: 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’...

  • Page 29: Connecting Your Monitor

    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 DP/USB type-C cable from your monitor to the computer. 3 Switch on your monitor.
  • Page 30 Supports USB Power Delivery (PD), with profiles up to 65 W. NOTE: Regardless of the power requirement/actual power consumption of your laptop, or the remaining power runtime in your battery, the Dell U2421HE/U2721DE monitor is designed to supply power delivery of up to 65 W to your laptop.
  • Page 31 Connecting the monitor for USB-C Multi-Stream Transport (MST) function DP in DP out USB Type-C USB Type-C NOTE: The maximum number of supported U2721DE via MST is subjected to the bandwith of the USB-C source. Please refer to “product specific problems –No image when using USB-C MST”.

  • Page 32: Organizing Your Cables

    Organizing Your Cables After attaching all necessary cables to your monitor and computer, (see Connect- ing Your Monitor for cable attachment) organize all cables as shown above. Removing the Monitor Stand CAUTION: To prevent scratches on the LCD screen while removing the stand, make sure that the monitor is placed on a soft, clean surface.

  • Page 33: Wall Mounting (Optional)

    Wall Mounting (Optional) U2421HE NOTE: Use M4 x 10 mm screws to connect the monitor to the wall-mounting 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.

  • Page 34: Operating The Monitor

    Operating the Monitor Turning on the Monitor Press the button to turn on the monitor. Using the Front Panel Controls Use the control buttons at the bottom edge of the monitor to adjust the characteristics of the image being displayed. As you use these buttons to adjust the controls, an OSD shows the numeric values of the characteristics as they change.
  • Page 35 The following table describes the front panel buttons: Front-Panel Button Description Use this button to choose from a list of preset color modes. Shortcut key: Preset Modes Use this button to choose from a list of Input Source. Shortcut key: Input Source Use this menu button to launch the on-screen display (OSD) and select the OSD menu.

  • Page 36: Using The Osd Lock Function

    Using the OSD Lock function 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. Dell UltraSharp 24/27 Monitor Brightness/Contrast Language Input Source Rotation...
  • Page 37 Options Description Use this icon to run the built-in diagnostics, see Built-in Diagnostics. Built-in Diagnostics 3. Hold for 4 seconds, Select the following table describes the unlock icons: Options Description Use this icon to unlock OSD menu function. Menu Buttons lock Use this icon to unlock power button from powering off.
  • Page 38 Front-Panel Button Use the buttons on the front of the monitor to adjust the image settings. Front Panel Button Description Use the Up (increase) and Down (decrease) keys to adjust items in the OSD menu. Down Use the OK button to confirm your selection. Use the Back button to go back to the previous menu.

  • Page 39: Using The On-Screen Display (Osd) Menu

    OSD menu, exit the OSD menu, or wait for the OSD menu to disappear. 1 Press the button to launch the OSD menu and display the main menu. Dell UltraSharp 24/27 Monitor Brightness/Contrast Input Source Color 75 %...
  • Page 40 Icon Menu and Description Submenus Brightness/ Use this menu to activate Brightness/Contrast adjustment. Contrast Dell UltraSharp 24/27 Monitor Brightness/Contrast Input Source Color 75 % Display Menu 75 % Personalize Others Brightness Brightness adjusts the luminance of the backlight (minimum 0; maximum 100).
  • Page 41 Reset Input Resets your monitor’s Input Source settings to the factory Source defaults. Color Use the Color menu to adjust the color setting mode. Dell UltraSharp 24/27 Monitor Brightness/Contrast Preset Modes Standard Input Source Input Color Format Color...
  • Page 42 Menu and Description Submenus Preset Modes When you select Preset Modes, you can choose Standard, ComfortView, Multiscreen Match, Movie, Game, Color Temp. or Custom Color from the list. Dell UltraSharp 24/27 Monitor Brightness/Contrast Preset Modes Standard Input Source Input Color Format...
  • Page 43 • RGB: Select this option if your monitor is connected to a computer (or DVD player) using the USB Type-C, DP cable. YPbPr: Select this option if your DVD player supports only YPbPr output. Dell UltraSharp 24/27 Monitor Brightness/Contrast Preset Modes Input Source...
  • Page 44 Icon Menu and Description Submenus Display Use the Display menu to adjust image. Dell UltraSharp 24/27 Monitor Brightness/Contrast Aspect Ratio Wide 16:9 Input Source Sharpness Color Response Time Normal Display Menu USB-C Prioritization High Resolution Personalize Reset Display Others Aspect Ratio Adjust the image ratio to Wide 16:9, Auto Resize, 4:3, 1:1.
  • Page 45 Submenus 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. Dell UltraSharp 24/27 Monitor Brightness/Contrast Language English Input Source...
  • Page 46 Icon Menu and Description Submenus Lock Controls user access to adjustments. the buttons are locked. Dell UltraSharp 24/27 Monitor Brightness/Contrast Language Input Source Rotation Color Transparency Display Timer Menu Lock Menu Buttons Personalize Reset Menu Power Button Menu + Power Buttons...
  • Page 47 Icon Menu and Description Submenus Personalize Dell UltraSharp 24/27 Monitor Brightness/Contrast Shortcut Key 1 Preset Modes Input Source Shortcut Key 2 Brightness/Contrast Color Power Button LED On During Active Display USB-A Charging O During Standby Menu USB-C Charging O During Power O...
  • Page 48 Icon Menu and Description Submenus Others Dell UltraSharp 24/27 Monitor Brightness/Contrast Display Info Input Source DDC/CI Color LCD Conditioning Display Firmware M2T101 Menu Service Tag H8CJ2NF Personalize Reset Others Others Factory Reset ENERGY STAR ® Select this option to adjust the OSD settings such as the DDC/CI, LCD conditioning, and so on.
  • Page 49 Firmware version. Service Tag 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.
  • Page 50 When the monitor does not support a particular resolution mode, you can see the following message: U2421HE Dell UltraSharp 24 Monitor The current input timing is not supported by the monitor display. Please change your input timing to 1920x1080, 60Hz or any other monitor listed timing as per the monitor specifications.
  • Page 51 When the monitor enters the Power Save mode, the following message will appear: Dell UltraSharp 24/27 Monitor Entering Power Save Mode. U2421HE/U2721DE Activate the computer and wake up the monitor to gain access to the OSD. If you press any button other than the power button, the following messages will appear...
  • Page 52 When Auto Select for USB-C is set to Prompt for Multiple Inputs. • When the DP cable is connected to the monitor. Dell UltraSharp 24/27 Monitor Switch to USB-C Video Input: U2421HE/U2721DE When you select OSD items of High resolution in Display feature, the following message will...
  • Page 53 When USB-C Prioritization is set to High Data Speed, select OSD items of Factory Reset in Other feature, the following message will appear: Dell UltraSharp 27 Monitor Please disconnect any USB storage device to your monitor during the switching process (up to 12 seconds).

  • Page 54: Troubleshooting

    While in self-test mode, the power LED remains white. Also, depending upon the selected input, one of the dialogs shown below will continuously scroll through the screen. Dell UltraSharp 24/27 Monitor No DP Cable The display will go into Power Save Mode in 4 minutes.

  • Page 55: Built-In Diagnostics

    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. NOTE: You can run the built-in diagnostics only when the video cable is unplugged and the monitor is in self-test mode.

  • Page 56: Common Problems

    Missing Pixels LCD screen has • Cycle power on-off. spots • 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: www.dell.com/support/monitors. Stuck-on Pixels LCD screen has • Cycle power On-Off. bright spots • Pixel that is permanently off is a natural defect that can occur in LCD technology.

  • Page 57: Product Specific Problems

    Common What You Possible Solutions Symptoms Experience Missing Color Picture missing • Perform monitor self-test. color • 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.
  • Page 58 • If the Notebook requires a >65 W power adaptor, it laptop, and so on may not charge with the USB Type-C connection. • Ensure that you use only Dell approved adapter or the adapter that comes with the product. • Ensure that the USB Type-C cable is not damaged.

  • Page 59: Appendix

    Contacting Dell NOTE: If you do not have an active Internet connection, you can find contact information on your purchase invoice, packing slip, bill, or Dell product catalog. Dell provides several online and telephone-based support and service options. Availability varies by country and product, and some services may not be available in your area.

  • Page 60: Setting Up Your Monitor

    Dell computer 1 Go to www.dell.com/support, enter your service tag, and download the latest driver for your graphics card. 2 After installing the drivers for your graphics adapter, attempt to set the resolution to 1920 x 1080 (U2421HE)/2560 x 1440 (U2721DE) again.
  • Page 61 Non-Dell computer In Windows Vista, 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 Personalization.

  • Page 62: Maintenance Guidelines

    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. For best practices, follow these instructions in the list below while unpacking, cleaning, or handling your monitor: • To clean your anti-static screen, lightly dampen a soft, clean cloth with water.

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