Dell U2421HE Users Guide
Dell U2421HE Manual
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- Dell U2421HE | Users Guide - Page 1
Dell UltraSharp 24/27 USB-C Hub Monitor - U2421HE/U2721DE User's Guide Model: U2421HE/U2721DE Regulatory model: U2421HEt/U2721DEt - Dell U2421HE | Users Guide - Page 2
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 . Copyright © 2020 Dell Inc. or its subsidiaries. All rights reserved. Dell, EMC, and other trademarks are trademarks of Dell Inc. or its - Dell U2421HE | Users Guide - Page 3
Contents About Your Monitor 5 Package Contents 5 Product Features 6 Identifying Parts and Controls 7 Monitor Specifications 10 Plug-and-Play 25 LCD Monitor Quality and Pixel Policy 25 Setting Up the Monitor 26 Attaching the Stand 26 Using the Tilt, Swivel, and Vertical Extension 28 - Dell U2421HE | Users Guide - Page 4
Troubleshooting 56 Self-Test 56 Built-in Diagnostics 57 Setting USB-C Prioritization when USB-C Charging is set to On During Power Off 58 Common Problems 59 Product Specific Problems 60 Appendix 63 Safety Instructions 63 FCC Notices (U.S. only) and Other Regulatory Information 63 Contacting - Dell U2421HE | Users Guide - 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 may not be available in certain - Dell U2421HE | Users Guide - Page 6
Quick Setup Guide • Safety,Environmental,and Regulatory Information • Factory Calibration Report Product Features The Dell UltraSharp U2421HE/U2721DE a single-cable, network-connected experience. • Plug and play capability if supported by your system. • On-Screen Display (OSD) adjustments for ease - Dell U2421HE | Users Guide - Page 7
Identifying Parts and Controls Front view 1 2 Label 1 2 Description Function buttons (For more information, see Operating the Monitor) Power on/off button (with LED indicator) About Your Monitor | 7 - Dell U2421HE | Users Guide - Page 8
ID XXXXXXXXXX U2421HE Address for EU Only: Raheen Business Park Limerick Ireland www.dell.com/regulatory_compliance XXXXX U2421HE U2421HE January 2020 Refer to this label if you need to contact Dell and Service Tag label for technical support. 6 Cable management slot Use to organize cables - Dell U2421HE | Users Guide - Page 9
60 Hz(U2421HE) and 2560 x 1440 at 60 Hz(U2721DE), PD 20 V/3.25 A, 15 V/3 A, 9 V/3 A, 5 V/3 A. NOTE: USB Type-C is not supported on Windows versions that are prior to Windows 10. DP port (out) DP output for MST (multi-stream transport) capable monitor. To enable MST, refer to instruction on section - Dell U2421HE | Users Guide - Page 10
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 - Dell U2421HE | Users Guide - Page 11
monitor to active area) Adjustability Height adjustable stand Tilt Swivel Cable management Dell Display Manager (DDM)Compatibility Security • 1 x DP 1.4 (HDCP native only, under Custom Mode preset. Resolution Specifications Model U2421HE Horizontal scan range 30 kHz to 83 kHz Vertical scan - Dell U2421HE | Users Guide - Page 12
Preset Display Modes U2421HE Display Mode 720 x 400 VESA, 640 x 480 VESA, 640 x 480 VESA, 800 x 600 VESA, 800 x 600 VESA, 1024 x 768 VESA, 1024 x 768 VESA, 1152 x 864 - Dell U2421HE | Users Guide - Page 13
2560 x 1440/60 Hz Maximum number of external monitors that can be supported 2560 x 1440/60 Hz 1 NOTE: Maximum external monitor resolution supported is 2560 x 1440 60 Hz only. USB-C MST Multi-Stream Transport (MST) Modes U2421HE OSD Dislay Info: Link rate(current) HBR3 HBR2 Maximum number of - Dell U2421HE | Users Guide - Page 14
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 mm (21.20 in.) 39.0 mm (1.54 in.) 355.0 mm (13.98 in.) 612.2 mm (24.10 in.) 39.0 mm (1.54 in.) 393.5 mm (15.49 in.) 347.0 mm (13.66 - Dell U2421HE | Users Guide - Page 15
50 lb) 230.0 mm (9.06 in.) 180.0 mm (7.09 in.) 8.72 kg (19.22 lb) 6.24 kg (13.75 lb) 4.19 kg (9.23 lb) 1.72 kg (3.79 lb) Environmental Characteristics Model U2421HE/U2721DE Compliant Standards • ENERGY STAR certified Monitor. • EPEAT registered where applicable. EPEAT registration varies by - Dell U2421HE | Users Guide - Page 16
, the monitor automatically resumes functioning. The following table shows the power consumption and signaling of this automatic power saving feature. U2421HE VESA Modes Normal operation Active-off mode Switch off Horizontal Vertical Video Power Indicator Sync Sync Active Active Active White - Dell U2421HE | Users Guide - Page 17
any button in the activeoff mode, the following message is displayed: Dell UltraSharp 24/27 Monitor No DP signal from your device. Press any key on , press the monitor button again to select the correct input source. U2421HE/U2721DE *Zero power consumption in OFF mode can only be achieved by - Dell U2421HE | Users Guide - Page 18
Pin Assignments DP port (in) Pin number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 20-pin side of the connected signal cable ML3(n) GND ML3(p) ML2(n) GND ML2(p) ML1(n) GND ML1(p) ML0(n) GND ML0(p) CONFIG1 CONFIG2 AUX CH (p) GND AUX CH (n) Hot Plug Detect Return DP_PWR 18 | About Your - Dell U2421HE | Users Guide - Page 19
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 - Dell U2421HE | Users Guide - Page 20
HDMI port Pin number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 19-pin side of the connected signal cable TMDS DATA 2+ TMDS DATA 2 SHIELD TMDS DATA 2TMDS DATA 1+ TMDS DATA 1 SHIELD TMDS DATA 1TMDS DATA 0+ TMDS DATA 0 SHIELD TMDS DATA 0TMDS CLOCK+ TMDS CLOCK SHIELD TMDS CLOCKCEC Reserved (N.C. - Dell U2421HE | Users Guide - Page 21
USB Type-C port Pin Signal A1 GND A2 SSTXp1 A3 SSTXn1 A4 VBUS A5 CC1 A6 Dp1 A7 Dn1 A8 SBU1 A9 VBUS A10 SSRXn2 A11 SSRXp2 A12 GND Pin Signal B12 GND B11 SSRXp1 B10 SSRXn1 B9 VBUS B8 SBU2 B7 Dn1 B6 Dp1 B5 CC2 B4 VBUS B3 SSTXn2 B2 SSTXp2 B1 GND About - Dell U2421HE | Users Guide - Page 22
USB ports: • 4 downstream - 2 at left side, 2 at bottom Power Charging Port - the ports with battery icon supports fast current charging capability if the device is BC 1.2 compatible. NOTE: The monitor's USB ports work only when the monitor is on or in the power save mode. In power save mode - Dell U2421HE | Users Guide - Page 23
1000pF GROUND 6 CT 13 GREEN 7 TD3 + 14 GREEN Driver installation Install the Realtek USB GBE Ethernet Controller Driver for Dell U2421HE/U2721DE available for your system. This is available for download at www.dell.com/support under the "Driver and download" section. Network (RJ45) data rate via - Dell U2421HE | Users Guide - Page 24
: • 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. 24 | About Your Monitor - Dell U2421HE | Users Guide - Page 25
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. About Your Monitor | 25 - Dell U2421HE | Users Guide - Page 26
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. - Dell U2421HE | Users Guide - Page 27
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 | 27 - Dell U2421HE | Users Guide - Page 28
you purchased any other stand, refer to the respective stand setup guide for set up instructions. Tilt, Swivel and Vertical Extension With the stand attached to download the graphics driver, go to www.dell.com/support and see the Download section for Video Drivers for latest driver updates. NOTE: - Dell U2421HE | Users Guide - Page 29
Graphic Properties, select the Rotation tab, and then set the preferred rotation. NOTE: If you do not see the rotation option or it is not working correctly, go to www.dell.com/support and download the latest driver for your graphics card. Setting Up the Monitor | 29 - Dell U2421HE | Users Guide - Page 30
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. NOTE: U2421HE/U2721DE default setting is DP 1.4. A DP 1.1 Graphic card may not display normally. Please refer to "product specific problems - No image - Dell U2421HE | Users Guide - Page 31
monitor: • Can be used as USB Type-C or DisplayPort 1.4, alternatively. • Supports USB Power Delivery (PD), with profiles up to 65 W. NOTE: Regardless of 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 - Dell U2421HE | Users Guide - Page 32
Transport (MST) function DP in USB Type-C DP out 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". NOTE: Remove the rubber plug when using DP out connector - Dell U2421HE | Users Guide - Page 33
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 CAUTION: To prevent scratches on the LCD screen while removing the stand, make sure that the - Dell U2421HE | Users Guide - Page 34
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. 3 Use a - Dell U2421HE | Users Guide - Page 35
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 - Dell U2421HE | Users Guide - Page 36
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 Input Source. Shortcut key: Input Source 3 Use this menu button to launch - Dell U2421HE | Users Guide - Page 37
Power Button Menu + Power Buttons Disable 1. The following message will appear: Dell UltraSharp 24/27 Monitor Are you sure you want to lock the Menu Buttons? To unlock the Buttons, refer to the User's Guide. Yes No U2421HE/U2721DE 2. Select 'Yes' to Lock the buttons, the following table - Dell U2421HE | Users Guide - Page 38
Options 4 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 1 Description Use this icon to unlock OSD menu function. Menu Buttons lock 2 Use this icon - Dell U2421HE | Users Guide - Page 39
Front‑Panel Button Use the buttons on the front of the monitor to adjust the image settings. Front Panel Button 1 1 23 Description Use the Up (increase) and Down (decrease) keys to adjust items in the OSD menu. Up 2 Down Use the OK button to confirm your selection. OK 3 Use the Back button - Dell U2421HE | Users Guide - Page 40
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 Display Menu Personalize Others 75 % 75 % 2 Press the and buttons to move between options. As you move - Dell U2421HE | Users Guide - Page 41
and lightness on the monitor. Use the Input Source menu to select between different video inputs that are connected to your monitor. Dell UltraSharp 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others USB Type-C DP HDMI Auto Select Auto Select for USB-C Reset - Dell U2421HE | Users Guide - Page 42
input. Resets your monitor's Input Source settings to the factory defaults. Use the Color menu to adjust the color setting mode. Dell UltraSharp 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Preset Modes Input Color Format Reset Color Standard RGB 42 - Dell U2421HE | Users Guide - Page 43
from the list. Dell UltraSharp 24/27 Monitor Brightness/Contrast eyes. • Blink frequently to moisten or rewet your eyes when working with the monitor. • Take regular and frequent breaks for 20 at 10,000K. • Custom Color: Allows you to manually adjust the color settings. Press the and buttons to - Dell U2421HE | Users Guide - Page 44
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 Input Source Color Display Menu Personalize Others Preset Modes Input Color Format Reset Color RGB YPbPr Hue - Dell U2421HE | Users Guide - Page 45
Use the Display menu to adjust image. Dell UltraSharp 24/27 Monitor Brightness/Contrast Input Source Color Display pack and is powered directly from the monitor USB Type-C port (such as the Dell OptiPlex Ultra Desktop), changing USB-C Prioritization on the fly would interrupt the power from - Dell U2421HE | Users Guide - Page 46
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 Input Source Color Display Menu Personalize Others Language Rotation Transparency Timer Lock Reset Menu English 20 20 s Disable Language - Dell U2421HE | Users Guide - Page 47
Icon Menu and Submenus Lock Description Controls user access to adjustments. the buttons are locked. Dell UltraSharp 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Language Rotation Transparency Timer Lock Reset Menu Menu Buttons Power Button Menu + Power - Dell U2421HE | Users Guide - Page 48
Icon Menu and Submenus Personalize Description Dell UltraSharp 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Shortcut Key 1 Shortcut Key 2 Power Button LED USB-A Charging USB-C Charging Reset Personalization Preset - Dell U2421HE | Users Guide - Page 49
for best user experience and optimum performance of your monitor. Dell UltraSharp 24/27 Monitor Brightness/Contrast Display Info Input Source DDC/CI On Color LCD Conditioning O Display Firmware Menu Service Tag Personalize Reset Others Others Factory Reset Operating the Monitor - Dell U2421HE | Users Guide - Page 50
default settings. These are also the settings for ENERGY STAR® tests. Dell UltraSharp 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Display Info DDC/CI LCD Conditioning Firmware Service Tag Reset Others Factory Reset On O M2T101 H8CJ2NF ENERGY STAR® 50 - Dell U2421HE | Users Guide - Page 51
OSD Warning Messages 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 - Dell U2421HE | Users Guide - Page 52
in 4 minutes. www.dell.com/support/U2421HE www.dell.com/support/U2721DE or U2421HE/U2721DE Dell UltraSharp 24/27 Monitor No USB Type-C Cable The display will go into Power Save Mode in 4 minutes. www.dell.com/support/U2421HE www.dell.com/support/U2721DE U2421HE/U2721DE 52 | Operating the - Dell U2421HE | Users Guide - Page 53
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 DP cable is connected to the monitor. Dell UltraSharp 24/27 Monitor Switch to USB-C Video Input: Yes No U2421HE/U2721DE If - Dell U2421HE | Users Guide - Page 54
want to continue? Yes No U2721DE • Select OSD items of Display Reset in Display feature, the following message will appear: Dell UltraSharp 27 Monitor If your PC is Dell Optiplex Ultra and powered from USB-C, you need to carry out the following steps before resetting: 1. Select ' No' 2. Go to - Dell U2421HE | Users Guide - Page 55
Other feature, the following message will appear: Dell UltraSharp 24/27 Monitor Are you sure you want to reset to default settings? Yes No U2421HE/U2721DE When you select 'Yes' to reset want to continue? Yes No U2721DE See Troubleshooting for more information. Operating the Monitor | 55 - Dell U2421HE | Users Guide - Page 56
Mode in 4 minutes. www.dell.com/support/U2421HE www.dell.com/support/U2721DE or Dell UltraSharp 24/27 Monitor U2421HE/U2721DE No USB Type-C Cable The display will go into Power Save Mode in 4 minutes. www.dell.com/support/U2421HE www.dell.com/support/U2721DE U2421HE/U2721DE 4 This box also - Dell U2421HE | Users Guide - Page 57
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 monitor is functioning properly. Check the video card and computer. Troubleshooting | 57 - Dell U2421HE | Users Guide - Page 58
of Input Source. 3 Use the or button to highlight USB Type-C. Dell UltraSharp 27 Monitor Input Source: Auto USB Type-C DP HDMI 4 Press seconds. 5 The USB-C Prioritization configuration message will appear. Dell UltraSharp 27 Monitor Select USB-C Prioritization: High Resolution High Data Speed - Dell U2421HE | Users Guide - Page 59
Problems Safety Related Issues Intermittent Problems Dell Monitor Quality and PixelPolicy, see Dell Support site at: www.dell.com/support/monitors. • Reset the monitor to factory settings. • Adjust brightness and contrast controls via OSD. • Do not perform any troubleshooting steps. • Contact Dell - Dell U2421HE | Users Guide - Page 60
, see Power Management Modes). • Alternatively, use a dynamically changing screensaver. Product Specific Problems Problem Screen image is too small Cannot adjust the monitor with the buttons on the front cable again, if necessary. • Reset the computer or video player. 60 | Troubleshooting - Dell U2421HE | Users Guide - Page 61
Problem consumption of device is over 65 W. • Ensure that you use only Dell approved adapter or the adapter that comes with the product. • Ensure . Download and install the latest graphics card driver. • Some DP 1.1a graphics card cannot support DP 1.4 monitors. Go to OSD menu, Troubleshooting | 61 - Dell U2421HE | Users Guide - Page 62
Problem The LAN port is not functioning What you experience Possible solutions OS setting or • Ensure that the latest BIOS and drivers for your cable connection computer are installed on your computer. on the computer, plug in the monitor power cord and Type-C cable. 62 | Troubleshooting - Dell U2421HE | Users Guide - Page 63
hazards, and/or mechanical hazards. For information on safety instructions, see the Safety, Environmental, and Regulatory Information ( Monitor support content: See www.dell.com/support/monitors. To contact Dell for sales, technical support, or customer service issues: 1 Go to www.dell.com/support. - Dell U2421HE | Users Guide - Page 64
, and follow the given steps. 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. NOTE - Dell U2421HE | Users Guide - Page 65
Non-Dell computer drivers for your graphics adapter, attempt to set the resolution to 1920 x 1080 (U2421HE)/2560 x 1440 (U2721DE) again. NOTE: If you are unable to set the recommended resolution, please contact the manufacturer of your computer or consider purchasing a graphics adapter that supports - Dell U2421HE | Users Guide - Page 66
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
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Model: U2421HE/U2721DE
Regulatory model: U2421HEt/U2721DEt
Dell UltraSharp 24/27
USB-C Hub Monitor - U2421HE/U2721DE
User’s Guide