Dell S2421HS/S2721HS/S2421HSX/ S2721HSX Monitor User’s Guide Monitor Model: S2421HS/S2721HS/S2421HSX/S2721HSX 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tilt, Swivel, and Vertical Extension . . . . . . . . . . . . . . . . . 25 Rotating the display . . . . . . . . . . . . . . . . . . . . 26 Configuring the display settings on your computer after rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Connecting your monitor . . . . . . . . . . . . . . . . . .27 Organizing your cables . . . . . . . . . . . . . . . . . . .
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.
• Quick Start Guide • Safety, Environmental, and Regulatory Information Product features The Dell S2421HS/S2721HS/S2421HSX/S2721HSX monitor has an active matrix, Thin Film Transistor (TFT), Liquid Crystal Display (LCD), and LED backlight. The monitor features include: • S2421HS/S2421HSX: 60.45 cm (23.80 in.) active area display (measured diagonally). 1920 x 1080 (16:9) resolution, plus full-screen support for lower resolutions. • S2721HS/S2721HSX: 68.6 cm (27 in.) active area display (measured diagonally).
Identifying parts and controls Front view 1 2 1 2 S2421HS/S2721HS S2421HSX/S2721HSX Label 1 2 8 | Description Function buttons 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 3 5 4 S2421HS/S2721HS 1 2 3 5 4 S2421HSX/S2721HSX Label 1 2 3 4 5 Description VESA mounting holes (100 mm x 100 mm-behind attached VESA cover) Regulatory label Stand release button Barcode, serial number, and Service Tag label Cable management slot Use Wall mount monitor using VESA-compatible wall mount kit (100 mm x 100 mm). Lists the regulatory approvals. Releases stand from monitor. Refer to this label if you need to contact Dell for technical support.
Bottom view 1 2 3 45 S2421HS/S2721HS 1 2 3 45 S2421HSX/S2721HSX Label Description 1 Security lock slot 2 Power connector 3 DisplayPort 4 HDMI port 5 Audio line-out port 10 | About your monitor Use Secures monitor with security cable lock (sold separately). Connect the power cable (shipped with your monitor). Connect your computer with the DisplayPort cable (optional). Connect your computer with the HDMI cable (shipped with your monitor).
Monitor specifications Model S2421HS/S2421HSX 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.) Active Area: Horizontal 527.04 mm (20.75 in.) Vertical 296.46 mm (11.67 in.) Area 156246.28 mm2 (242.15 in.2) S2721HS/S2721HSX Pixel pitch Pixel per inch (PPI) Viewing angle: Horizontal Vertical Brightness Contrast ratio Display screen coating 0.2745 mm x 0.2745 mm 92.56 0.3114 mm x 0.3114 mm 81.
Height adjustable stand Tilt Swivel Pivot Cable management Dell Display Manager (DDM)Compatibility Security 100 mm 110mm -5° to 21° -30° to 30° -90° to 90° Yes Easy Arrange and other key features Security-lock slot (cable lock sold separately) *At panel native resolution only, under Custom Mode preset.
VESA, 1600 x 900 60.0 60.0 108.0 +/+ CVT, 1920 x 1080 67.5 60.0 148.5 +/+ CVT, 1920 x 1080 83.89 75.0 174.5 +/- Electrical specifications Model S2421HS/S2421HSX/S2721HS/S2721HSX Video input signals • Digital video signal for each differential line Per differential line at 100 ohm impedance • DP/HDMI signal input support 100-240 VAC/50 or 60 Hz ± 3 Hz/1.5 A (maximum) Input voltage/frequency/ current Inrush current Power consumption S2421HS/S2421HSX 0.2 W (Off Mode)1 0.
This product qualifies for ENERGY STAR in the factory default settings, which can be restored by “Factory Reset” function in the OSD menu. Changing the factory default settings or enabling other features may increase power consumption that could exceed the ENERGY STAR specified limit. Physical characteristics Model S2421HS/S2421HSX S2721HS/S2721HSX Connector type • 1 x HDMI1.4 port • 1 x DisplayPort 1.2 • 1 x Audio line-out port Signal cable type Dimensions (with stand): Height (extended) 1.8 m HDMI1.
Weight of stand assembly 1.3 kg (2.87 lb) 1.5 kg (3.
Pin assignments DisplayPort Pin 20-pin side of number the connected signal cable Pin 20-pin side of number the connected signal cable 1 ML3 (n) 11 GND 2 GND 12 ML0 (p) 3 ML3 (p) 13 CONFIG1 4 ML2 (n) 14 CONFIG2 5 GND 15 AUX CH (p) 6 ML2 (p) 16 GND 7 ML1 (n) 17 AUX CH (n) 8 GND 18 Hot Plug Detect 9 ML1 (p) 19 Return 10 ML0 (n) 20 DP_PWR 16 | About your monitor
HDMI port Pin number 19-pin side of the connected signal cable 1 TMDS DATA 2+ 2 TMDS DATA 2 SHIELD 3 TMDS DATA 2- 4 TMDS DATA 1+ 5 TMDS DATA 1 SHIELD 6 TMDS DATA 1- 7 TMDS DATA 0+ 8 TMDS DATA 0 SHIELD 9 TMDS DATA 0- 10 TMDS CLOCK+ 11 TMDS CLOCK SHIELD 12 TMDS CLOCK- 13 CEC 14 Reserved (N.C.
Plug-and-play You can install the monitor in any Plug-and-Play-compatible system. The monitor automatically provides the computer with its extended display identification data (EDID) using display data channel (DDC) protocols so that the computer can configure itself and optimize the monitor settings. Most monitor installations are automatic; you can select different settings if desired. For more information about changing the monitor settings, see Operating the monitor.
Ergonomics CAUTION: Improper or prolonged usage of keyboard may result in injury. CAUTION: Viewing the monitor screen for extended periods of time may result in eye strain. For comfort and efficiency, observe the following guidelines when setting up and using your computer workstation: • Position your computer so that the monitor and keyboard are directly in front of you as you work. Special shelves are commercially available to help you correctly position your keyboard.
• Vary your work activities. Try to organize your work so that you do not have to sit and work for extended periods of time. Try to stand or get up and walk around at regular intervals. • Keep the area under your desk clear of obstructions and cables or power cords that may interfere with comfortable seating or present a potential trip hazard.
Handling and moving your display To ensure that 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. Slide the tabs on the stand riser into the slots on the display back cover and press down the stand assembly to snap it into place. CAUTION: Hold the stand riser firmly when lifting the monitor to avoid any accidental damage. 5. Hold the stand riser and lift the monitor carefully, then place it on a flat surface.
Using the tilt, swivel, and vertical extension Note: The following instructions are applicable only for the stand that was shipped with your monitor. If you are connecting a stand that you purchased from any other source, follow the setup instructions that were included with the stand. Tilt, Swivel, and Vertical Extension With the stand attached to the monitor, you can tilt the monitor for the most comfortable viewing angle.
Rotating the display Before you rotate the display, extend the display vertically until the top of the stand riser, and then tilt the display backwards until the maximum to avoid hitting the bottom edge of the display. 1 90° 90° 2 NOTE: To toggle the display setting on your Dell computer between landscape and portrait when rotating the display, download and install the latest graphics driver. To download, go to https://www.dell.com/support/drivers and search for the appropriate driver.
NOTE: If you do not see the rotation option or it is not working correctly, go to https://www.dell.com/support and download the latest driver for your graphics card. Connecting your monitor WARNING: Before you begin any of the procedures in this section, follow the Safety instructions. To connect your monitor to the computer: 1. Turn off your computer. 2. Connect the DisplayPort or HDMI cable from your monitor to the computer. 3. Turn on your monitor. 4.
Organizing your cables 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 about 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, ensure that the monitor is placed on a soft, clean surface. NOTE: The following instructions are applicable only for the stand that was shipped with your monitor. If you are connecting a stand that you purchased from any other source, follow the setup instructions that were included with the stand. To remove the stand: 1.
Wall mounting (optional) NOTE: Use M4 x 10 mm screws to secure the wall-mounting kit to the monitor. See the documentation that is shipped with the VESA-compatible wall mounting kit. 1. Place a flat cushion or a sitting mat near the edge of a table and place the monitor on it with the display facing down. 2. Remove the stand. 3. Using a Phillips crosshead screwdriver, remove the four screws that secure the back panel. 4. Connect the mounting bracket from the wall mounting kit to the monitor. 5.
Operating the monitor Power on the monitor Press the button to turn on the monitor. Using the 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 Buttons Menu Reset Menu Power Button 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 Buttons lock 2 Power Button lock 3 Use this option to lock power button. This will prevent the user to turn off the monitor using the power button. Use this option to lock OSD menu and power button to turn off the monitor.
Options 1 Description Use this option to unlock OSD menu function. Menu Buttons 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 Buttons unlock 4 Use this option to run the built-in diagnostics, see Built-in diagnostics. 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 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 Color 75% Display Menu Personalize 75% 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 Input Source Description Use the Input Source menu to select between different video inputs that are be connected to your monitor. Dell 24/27 Monitor Brightness/Contrast DP Input Source HDMI Auto select Color On Reset Input Source Display Menu Personalize Others DP Use to select the DP input source. HDMI Use to select the HDMI input source. Auto Select Use to select Auto Select to scan for available input signals.
Icon Menu and submenus Preset Modes Description 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 Input Color Format Description • 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. Allows you to set the video input mode to: • RGB: Select this option if your monitor is connected to a computer (or DVD player) using the HDMI, DP cable. • YPbPr: Select this option if your DVD player supports only YPbPr output.
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 Select the image ratio between 16:9(Wide), 4:3, and 5:4. Sharpness Makes the image look sharper or softer. Use or to adjust the sharpness from ‘0’ to ‘100’.
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 20s 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 Reset Menu 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 M3T102 Menu Service Tag ABCDEFG Personalize Reset Others Others Factory Reset ENERGY STAR Display Info Displays the monitor’s current settings.
Icon Menu and Description submenus LCD Helps reduce minor cases of image retention. Depending on Conditioning the degree of image retention, the program may take some time to run. Select On to start the process. Dell 24/27 Monitor Brightness/Contrast Display Info Input Source DDC/CI Color LCD Conditioning On Display Firmware Off Menu Service Tag Personalize Reset Others Others Factory Reset Firmware 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: S2421HS/S2421HSX S2721HS/S2721HSX 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.
When you select OSD items of On in Standby Mode in Personalize feature, the following message appears.
If either DP or HDMI input is selected and the corresponding cable is not connected, the following floating dialog box appears. S2421HS/S2421HSX S2721HS/S2721HSX Dell 24 Monitor Dell 27 Monitor No DP Cable No DP Cable The display will go into Standby mode in 4 minutes. The display will go into Standby mode in 4 minutes. www.dell.com/S2421HS www.dell.com/S2421HSX www.dell.com/S2721HS www.dell.
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 drop-down 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 Intermittent problems What You Possible Solutions Experience Monitor • Ensure that the video cable connecting the malfunctions on monitor to the computer is connected properly and off and is secure. • Reset the monitor to factory settings. • Perform monitor self-test feature check to determine if the intermittent problem occurs in self-test mode. Missing color Picture missing • Perform monitor self-test.
Product specific problems Problem What You Experience Screen image is Image is too small centered on screen, but does not fill entire viewing area Cannot adjust OSD does not the monitor appear on the with the screen buttons on the front panel No Input Signal No picture, the when user LED light is controls are white pressed The picture The picture does not fill the cannot fill the entire screen height or width of the screen Possible Solutions • Check the Aspect Ratio setting in the Display menu OSD.
Appendix FCC notices (U.S. only) and other regulatory information For FCC notices and other regulatory information, see the regulatory compliance website located at https://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.
