Dell S2421HN/S2721HN/S2421NX/ S2721NX Monitor User’s Guide Model: S2421HN/S2721HN/S2421NX/S2721NX Regulatory model: S2421Ht/S2721Ht
NOTE: A NOTE indicates important information that helps you make better use of your monitor. 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting up the monitor . . . . . . . . . . . . . . . . . . . . . . 23 Connecting the stand . . . . . . . . . . . . . . . . . . . 23 Using the tilt . . . . . . . . . . . . . . . . . . . . . . . . 26 Connecting your monitor . . . . . . . . . . . . . . . . . .27 Organizing your cables . . . . . . . . . . . . . . . . . . 28 Securing your monitor using Kensington lock (optional) 28 Removing the monitor stand . . . . . . . .
Safety instructions CAUTION: 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 below. Ensure that you have received all the components and see Contacting Dell if anything is missing. NOTE: Some components may be optional and may not ship with your monitor. Some features may not be available in certain countries.
HDMI cable Dell S2421HN(NX)/S2721HN(NX) 2 1 1 2 3 Dell S2421H/S2721H 2 1 1 2 3 HDMI 3 4 1 HDMI1 HDMI2 2 12 4 3 HDMI H D MI H D MI HDMI HDMI H D MI MI 5 6 1 HDMI ©20 20Dell c. or In ts isubsidiarie s. 202 007 i 2 5° 21° i Dell .com /S2421H Dell .com /S2721H ww w.dell .com /co natctdell 74/6 .AN: 3E01. 0001 (DELL P rev.XPNF73 01) 3 4 HDMI1 HDMI2 4 1 1 3 2 2 HDMI HDMI HDMI HDMI HDMI HDMI 5 i 6 i 5° 1 21° 2 Dell.com/S2421HN/NX Dell.
Identifying parts and controls Front view 1 2 S2421HN/S2721HN 1 2 S2421NX/S2721NX Label Description 1 Function buttons 2 8 | Power on/off button (with LED indicator) About your monitor Use For more information, see Operating the monitor To turn the monitor on or off.
Back view 1 2 DELL S2421HN Flat Panel Monitor / Monitor Plano Panel / Moniteur à écran plat / 液晶顯示器 Model No. / N° de Modelo / Numéro de modèle /型號: S2421Ht Input Rating / Entrada / Daya Tegangan / Tension d’entrée: 100-240V ~ 50/60Hz 1.5A 輸入電源:交流電壓 100-240伏特, 1.5安培, 50/60赫茲 Made in China / Fabricado en China / Fabriqué en Chine / Сделано в Китае / 製造地:中國 Consumo de energía en operación: XX.
Bottom view 1 2 3 45 S2421HN/S2721HN 1 2 3 45 S2421NX/S2721NX Label Description 1 Security lock slot 2 3 4 5 10 | Power connector HDMI port 1 HDMI port 2 Audio Line-out port Use Secures monitor with security cable lock (sold separately). Connect the power cable (shipped with your monitor). Connect your computer with HDMI cable. Connect your computer with HDMI cable. Connect speakers to playback audio coming through HDMI audio channel. Only two-channel audio is supported.
Monitor specifications Model S2421HN/S2421NX S2721HN/S2721NX Screen type Active matrix - TFT LCD Panel Type In-plane switching Technology Aspect ratio 16:9 Viewable image dimensions Diagonal 60.45 cm (23.8 in.) 68.6 cm (27 in.) Active Area Horizontal 527.04 mm (20.75 in.) 597.89 mm (23.54 in.) Vertical 296.46 mm (11.67 in.) 336.31 mm (13.24 in.) 2 2 201073.02 mm2 (311.67 in.2) Area 156246.28 mm (242.15 in. ) Pixel pitch 0.2745 mm x 0.2745 mm 0.3114 mm x 0.3114 mm Pixel per inch (PPI) 92.56 81.
Swivel Pivot Cable management Dell Display Manager (DDM)Compatibility Security NA NA Yes Easy Arrange and other key features Security lock slot (cable lock sold separately) * At panel native resolution only, under Custom Mode preset.
Preset display modes S2421HN/S2421NX/S2721HN/S2721NX Display Mode Horizontal Frequency (kHz) 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 VESA, 1600 x 900 CVT, 1920 x 1080 CVT, 1920 x 1080 31.5 31.5 37.5 37.9 46.9 48.4 60.0 67.5 64.0 80.0 60.0 67.5 83.89 Vertical Frequency (Hz) 70.0 60.0 75.0 60.0 75.0 60.0 75.0 75.0 60.0 75.0 60.0 60.0 75.
Physical characteristics Model S2421HN/S2421NX Connector type • 2 x HDMI1.4 ports • 1 x Audio line-out port Signal cable type Dimensions (with stand) Height 1.8 m HDMI1.4 cable S2721HN/S2721NX 412.8 mm (16.25 in.) 453.3 mm (17.85 in.) Width 537.8 mm (21.17 in.) 609.9 mm (24.01 in.) Depth 152.8 mm (6.02 in.) 186.8 mm (7.35 in.) Height 322.6 mm (12.70 in.) 363.6 mm (14.32 in.) Width 537.8 mm (21.17 in.) 609.9 mm (24.01 in.) Depth 53.8 mm (2.12 in.) 54.0 mm (2.13 in.) Height 171.
Environmental characteristics Model S2421HN/S2421NX/S2721HN/S2721NX Compliant Standards • ENERGY STAR certified Monitor. • TCO Certified Display. • RoHS Compliant. • BFR/PVC Reduce monitor (excluding external cables). • Arsenic-Free glass and Mercury-Free for the panel only. Temperature Operating 0°C to 40°C (32°F to 104°F) Non-operating –20°C to 60°C (–4°F to 140°F) Humidity Operating 10% to 80% (non-condensing) Non-operating 5% to 90% (non-condensing) Altitude Operating (maximum) 5,000 m (16,404 ft.
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 standby mode*. If the computer detects input from the keyboard, mouse, or other input devices, the monitor automatically resumes functioning. The following table shows the power consumption and signaling of this automatic power saving feature.
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 24 Monitor No HDMI1 signal from your device. Press any key on the keyboard or move the mouse to wake it up. If there is no display, press the monitor button again to select the correct input source. S2421HN/S2421NX or Dell 27 Monitor No HDMI1 signal from your device. Press any key on the keyboard or move the mouse to wake it up.
NOTE: 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. Pin Assignments 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.
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.
• Adjust the ambient lighting around you (such as overhead lights, desk lamps, and the curtains or blinds on nearby windows) to minimize reflections and glare on the monitor screen. • Use a chair that provides good lower-back support. • Keep your forearms horizontal with your wrists in a neutral, comfortable position while using the keyboard or mouse. • Always leave space to rest your hands while using the keyboard or mouse. • Let your upper arms rest naturally on both sides.
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 CAUTION: Read and follow the Safety instructions before cleaning the monitor. WARNING: Before cleaning the monitor, unplug the monitor power cable from the electrical outlet.
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. CAUTION: Place monitor of a flat, clean, and soft surface to avoid scratching the display panel. To attach the monitor stand: 1.
4. Open the monitor protective cover and install the VESA screw cover. 5. Align the tabs on the stand-riser bracket with the grooves at the back of the monitor. 6. Insert the stand-riser bracket into monitor groove until it snaps into place.
CAUTION: Hold the stand riser firmly when lifting the monitor to avoid any accidental damage. 7. Hold the stand riser and lift the monitor carefully, then place it on a flat surface. 8. Lift the protective cover from the monitor.
Using the tilt 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. With the stand attached to the monitor, you can tilt the monitor for the most comfortable viewing angle. 5° 21° NOTE: The stand is detached when the monitor is shipped from the factory.
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 HDMI 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.
Organizing your cables HDMI After connecting 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 while removing the stand, make sure 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.
Wall mounting (Optional) DELL S2421HN Flat Panel Monitor / Monitor Plano Panel / Moniteur à écran plat / 液晶顯示器 Model No. / N° de Modelo / Numéro de modèle /型號: S2421Ht Input Rating / Entrada / Daya Tegangan / Tension d’entrée: 100-240V ~ 50/60Hz 1.5A 輸入電源:交流電壓 100-240伏特, 1.5安培, 50/60赫茲 Made in China / Fabricado en China / Fabriqué en Chine / Сделано в Китае / 製造地:中國 Consumo de energía en operación: XX.
Operating the monitor Power 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 specifications of the image being displayed. When using the control buttons, an On-Screen Display (OSD) menu appears on the screen with numeric values.
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 sources. Shortcut key: Input Source 3 Use this menu button to launch the on-screen display (OSD) and select the OSD menu. See Accessing the menu system. Menu 4 Use this button to go back to the main menu or exit the OSD main menu.
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. Dell 24/27 Monitor Brightness/Contrast Language Input Source Transparency Color Timer Display Lock Menu Menu Buttons Power Button Reset Menu Personalize Menu + Power Buttons Others Disable 2. The following message appears.
1. Press and hold Button 4 for four seconds, a menu appears on the screen. Dell 24/27 Monitor Select Option: 2. Select one of the following options: Options Description 1 Select this option to lock OSD menu function. Menu Button lock 2 Power Button lock 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.
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. Menu and Power Button unlock Use this option to run the built-in diagnostics, see Built-in Diagnostics. 4 Built-in Diagnostics Front‑panel button Use the buttons on the front of the monitor to adjust the image settings.
3 Use the Back button to go back to the previous menu. Back Using the On-Screen Display (OSD) menu Accessing the menu system NOTE: The changes you make using the OSD menu are automatically saved when you move to another OSD menu, when you exit the OSD menu, or when the OSD menu to disappears automatically. 1. Press the button to launch the OSD menu and display the main menu. Dell 24/27 Monitor Brightness/Contrast Input Source 75% Color Display Menu 75% Personalize Others 2.
Icon Menu and Submenus Brightness/ Contrast Description Use this menu to activate Brightness/Contrast adjustment. Dell 24/27 Monitor Brightness/Contrast Input Source 75% Color Display Menu 75% Personalize Others Brightness Brightness adjusts the luminance of the backlight (minimum 0; maximum 100). Press the button to increase brightness. Press the button to decrease brightness. Contrast Adjust the Brightness first, and then adjust Contrast only if further adjustment is necessary.
Icon Menu and Submenus HDMI 1 HDMI 2 Description Select HDMI1 input when you are using the HDMI1 connector. to select the HDMI input source. Use Select HDMI2 input when you are using the HDMI2 connector. to select the HDMI input source. Use Auto Select Reset Input Source Color to select Auto Select, the monitor scans for Use available input sources. Resets your monitor’s Input Source settings to the factory defaults. Use the Color menu to adjust the color setting mode.
Icon Menu and Description Submenus Preset Modes When you select Preset Modes, you can choose Standard, ComfortView, Movie, FPS, RTS, RPG, Warm, Cool or Custom Color from the list. Dell 24/27 Monitor Brightness/Contrast Preset Modes Standard Input Source Input Color Format ComfortView Color Reset Color Movie Display FPS Menu RTS Personalize RPG Others Warm Cool Custom Color • Standard: Default color settings. This is the default preset mode.
Icon Menu and Submenus Description • Warm: Increases the color temperature. The screen appears warmer with a red/yellow tint. • Cool : Decreases the color temperature. The screen appears cooler with blue tint. Input Color Format • Custom Color: Allows you to manually adjust the color settings. Press the and buttons to adjust the Red, Green, and Blue values and create your own preset color mode.
Icon Menu and Submenus Display Description Use the Display menu to adjust image. Dell 24/27 Monitor Brightness/Contrast Aspect Ratio Input Source Sharpness Wide 16:9 50 Color Response Time Normal Display Reset Display Menu Personalize Others Aspect Ratio Sharpness Select the image ratio between 16:9 (wide), 4:3, and 5:4. Makes the image look sharper or softer. Use or to adjust the sharpness from ‘0’ to ‘100’. Response Allows you to set the Response Time to Normal, Fast or Time Extreme.
Icon Menu and Submenus Menu Description 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 24/27 Monitor Brightness/Contrast Language English Input Source Transparency 20 Color Timer 20 s Display Lock Disable Menu Reset Menu Personalize Others Language Set the OSD display to one of eight languages.
Icon Menu and Submenus Lock Description Controls user access to adjustments. The buttons are locked. Dell 24/27 Monitor Brightness/Contrast Language Input Source Transparency Color Timer Display Lock Menu Buttons Menu Reset Menu Power Button Personalize Menu + Power Buttons Others Disable • 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.
Icon Menu and Submenus Personalize Description Dell 24/27 Monitor Brightness/Contrast Shortcut Key 1 Preset Modes Input Source Shortcut Key 2 Input Source Color Power Button LED On In On Mode Display Reset Personalization Menu Personalize Others Shortcut key 1 Shortcut key 2 Power Button LED Reset Personalization 44 | Select from Preset Modes, Brightness/Contrast, Input Source, Aspect Ratio set as shortcut key 1.
Icon Menu and Submenus Others Description Select this option to adjust the OSD settings such as the DDC/CI, LCD conditioning, and so on. Dell 24/27 Monitor Brightness/Contrast Display Info Input Source DDC/CI On Color LCD Conditioning Off Display Firmware 00X000 Menu Service Tag ABCDEF Personalize Reset Others Others Factory Reset ENERGY STAR Display Info Displays the monitor’s current settings.
Icon Menu and Submenus LCD Conditioning Description Helps reduce minor cases of image retention. Depending on the degree of image retention, the program may take some time to run. Select On to start the process. Dell 24/27 Monitor Firmware Brightness/Contrast Display Info Input Source DDC/CI Color LCD Conditioning On Display Firmware Off Menu Service Tag Personalize Reset Others Others Factory Reset Displays the firmware version of your monitor. Service Tag Displays the Service Tag.
OSD warning messages When the monitor does not support a particular resolution mode, you can see the following message: S2421HN/S2421NX S2721HN/S2721NX Dell 24 Monitor Dell 27 Monitor The current input timing is not supported by the monitor display. Please The current input timing is not supported by the monitor display.
If you press any button other than the power button, the following messages will appear depending on the selected input: S2421HN/S2421NX S2721HN/S2721NX Dell 24 Monitor Dell 27 Monitor No HDMI1 signal from your device. No HDMI1 signal from your device. Press any key on the keyboard or move the mouse to wake it up. Press any key on the keyboard or move the mouse to wake it up.
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 1080. 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.
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. 1 2 3 4 5 To run the built-in diagnostics: 1.
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 depressed fully.
Common symptoms Safety Related Issues What you Possible solutions experience Visible signs of • Do not perform any troubleshooting steps. smoke or sparks • Contact Dell immediately. Intermittent Monitor • Ensure that the video cable connecting the Problems 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.
Product specific problems Problem What you experience Screen image is Image is centered too small on screen, but does not fill entire viewing area Cannot adjust OSD does not the monitor appear on the screen with the buttons on the front panel No Input Signal No picture, the LED when user light is white controls are pressed The picture The picture cannot does not fill the fill the height or entire screen width of the screen 54 | Troubleshooting Possible solutions • Check the Aspect Ratio setting in
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). 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.
Outline dimension Unit : mm(inch) Dimension : Nominal Drawing : Not to scale 1.8 [0.07] 14.2 [0.56] 53.8 [2.12] S2421H/HN/NX Outline Dimension 5.4 [0.21] 100.0(2x) [3.94] 5 Z=43.0(1.69) 21 Z=44.0(1.73)(4x) M4x10(4x) 5.4 [0.21] 249.0 [9.80] 28.2 [1.11] 44.7 [1.76] 165.4 [6.51] 152.8 [6.02] 171.6 [6.76] 14.0 [0.55] 150.7 [5.93] 407.4 [16.04] 409.9 [16.14] 88.8 [3.50] 9.0 [0.36] 111.0 [4.37] 20.7 [0.82] 412.8 [16.25] 322.6 [12.70] 296.5 [11.67] 79.9 [3.15] 15.0 [0.59] 159.4 [6.28] 5.
S2721H/HN/NX Outline Dimension 14.3 [0.56] 1.8 [0.07] 54.0 [2.12] Unit : mm(inch) Dimension : Norminal Drawing : Not to scale Z=0 Tilt 6.0 [0.24] 5 100.0(2x) [3.94] 122.0 (2x) [4.80] 6.0 [0.24] 609.9 [24.01] 597.9 [23.54] Z=34.7(1.37) 21 Z=43.0(1.69) 6.0 [0.24] Z=44.0(1.73) (4x) 15.1 [0.59] 155.1 [6.11] 88.2 [3.47] 9.0 [0.36] 257.2 [10.13] 95.9 [3.78] 14.9 [0.59] 164.1 [6.46] 176.0 [6.93] 445.4 [17.54] 450.0 [17.72] 111.0 [4.37] 21.3 [0.84] 453.3 [17.85] 363.6 [14.32] 336.3 [13.
