Monitor Users Guide
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Contents Safety instructions 5 About your monitor 6 Package contents 6 Product features 7 Identifying parts and controls 8 Front view 8 Back view 9 Bottom view 10 Monitor specifications 11 Resolution specifications 12 Preset display modes 13 Electrical specifications 13 Physical characteristics 14 Environmental characteristics 15 Power management modes 16 Pin Assignments 18 Plug-and-play 19 LCD monitor quality and pixel policy 19 Ergonomics 19 Handling and moving your display 21 Maintenance guidelines 22 Cleaning your monitor 22 Contents | 3
Contents Safety instructions 5 About your monitor 6 Package contents 6 Product features 7 Identifying parts and controls 8 Front view 8 Back view 9 Bottom view 10 Monitor specifications 11 Resolution specifications 12 Preset display modes 13 Electrical specifications 13 Physical characteristics 14 Environmental characteristics 15 Power management modes 16 Pin Assignments 18 Plug-and-play 19 LCD monitor quality and pixel policy 19 Ergonomics 19 Handling and moving your display 21 Maintenance guidelines 22 Cleaning your monitor 22 Contents | 3
Monitor Users Guide
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...; 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 29 Wall mounting (Optional 30 Operating the monitor 31 Power on the monitor 31 Using the front panel controls 31 Using the OSD lock function 33 Front‑panel button 35 Using the On-Screen Display (OSD) menu 36 Accessing the menu system 36 OSD warning messages 47 Setting the maximum resolution 49 Troubleshooting 50...
...; 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 29 Wall mounting (Optional 30 Operating the monitor 31 Power on the monitor 31 Using the front panel controls 31 Using the OSD lock function 33 Front‑panel button 35 Using the On-Screen Display (OSD) menu 36 Accessing the menu system 36 OSD warning messages 47 Setting the maximum resolution 49 Troubleshooting 50...
Monitor Users Guide
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... viewing experience. • Extensive digital connectivity with a flicker-free screen. WARNING: The possible long-term effects of blue light emission from 48HZ -75HZ. • Power and OSD buttons lock. • Security lock slot. • 0.3 W standby power when in .) active area display (Measured diagonally) 1920 x 1080 (16:9) resolution, plus full-screen support for lower resolutions. • Tilt adjustment capability. • Removable pedestal and Video Electronics Standards Association (VESA™) 100 mm mounting holes for ease of blue light...
... viewing experience. • Extensive digital connectivity with a flicker-free screen. WARNING: The possible long-term effects of blue light emission from 48HZ -75HZ. • Power and OSD buttons lock. • Security lock slot. • 0.3 W standby power when in .) active area display (Measured diagonally) 1920 x 1080 (16:9) resolution, plus full-screen support for lower resolutions. • Tilt adjustment capability. • Removable pedestal and Video Electronics Standards Association (VESA™) 100 mm mounting holes for ease of blue light...
Monitor Users Guide
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... И005-20 DELL Flat Panel Monitor S2421HN Input Rating 100-240V ~ 50/60Hz 1.5A Made in China Manufactured date S2421HN t E E Flat Panel Monitor DEL型L号 : S2421HN Input Rating 100-240V ~ 50/60Hz 1.5A Made in China Manufactured date S2421HN t S2421HN/S2721HN 5 1 2 3 4 5 S2421NX/S2721NX Label Description 1 VESA mounting holes (100 mm x 100 mm-behind attached VESA cover) 2 Regulatory label 3 Stand release button 4 Barcode, serial number, and Service Tag label 5 Cable management slot Use Wall mount monitor using VESA- Operation is a unique...
... И005-20 DELL Flat Panel Monitor S2421HN Input Rating 100-240V ~ 50/60Hz 1.5A Made in China Manufactured date S2421HN t E E Flat Panel Monitor DEL型L号 : S2421HN Input Rating 100-240V ~ 50/60Hz 1.5A Made in China Manufactured date S2421HN t S2421HN/S2721HN 5 1 2 3 4 5 S2421NX/S2721NX Label Description 1 VESA mounting holes (100 mm x 100 mm-behind attached VESA cover) 2 Regulatory label 3 Stand release button 4 Barcode, serial number, and Service Tag label 5 Cable management slot Use Wall mount monitor using VESA- Operation is a unique...
Monitor Users Guide
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Connect speakers to playback audio coming through HDMI audio channel. NOTE: The audio line-out port does not support headphones. 10 | About your monitor). Connect your computer with security cable lock (sold separately). Bottom view 12 3 45 S2421HN/S2721HN Label Description 1 Security lock slot 2 Power connector 3 HDMI port 1 4 HDMI port 2 5 Audio Line-out port 12 3 45 S2421NX/S2721NX Use Secures monitor with HDMI cable. Only two-channel audio is supported. Connect your computer with your monitor Connect the power cable (shipped with HDMI cable.
Connect speakers to playback audio coming through HDMI audio channel. NOTE: The audio line-out port does not support headphones. 10 | About your monitor). Connect your computer with security cable lock (sold separately). Bottom view 12 3 45 S2421HN/S2721HN Label Description 1 Security lock slot 2 Power connector 3 HDMI port 1 4 HDMI port 2 5 Audio Line-out port 12 3 45 S2421NX/S2721NX Use Secures monitor with HDMI cable. Only two-channel audio is supported. Connect your computer with your monitor Connect the power cable (shipped with HDMI cable.
Monitor Users Guide
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... Horizontal 178° (typical) Vertical 178° (typical) Brightness 250 cd/m² (typical) 300 cd/m² (typical) Contrast ratio 1000 to 1 (typical) Display screen coating Anti-glare treatment of the front polarizer (3H) hard coating Backlight LED edgelight system Response Time (Gray to Gray) 8 ms (normal) 5 ms (fast) 4 ms (extreme) Color depth 16.7 million colors Color gamut* NTSC 72% Connectivity • 2 x HDMI 1.4 • 1 x Audio...
... Horizontal 178° (typical) Vertical 178° (typical) Brightness 250 cd/m² (typical) 300 cd/m² (typical) Contrast ratio 1000 to 1 (typical) Display screen coating Anti-glare treatment of the front polarizer (3H) hard coating Backlight LED edgelight system Response Time (Gray to Gray) 8 ms (normal) 5 ms (fast) 4 ms (extreme) Color depth 16.7 million colors Color gamut* NTSC 72% Connectivity • 2 x HDMI 1.4 • 1 x Audio...
Monitor Users Guide
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...front-panel control buttons to prevent access to lock the buttons. Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Language Transparency Timer Lock Reset Menu Menu Buttons Power Button Menu + Power Buttons Disable 2. Select Yes to the OSD menu and/ or power button. Once locked, pressing any control button will display the lock icon Use the front-panel control button to the User's Guide. Select one of the following message appears. To unlock the Buttons, refer to lock the button(s). 1234 5 Operating the monitor | 33 Yes No S2421HN...
...front-panel control buttons to prevent access to lock the buttons. Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Language Transparency Timer Lock Reset Menu Menu Buttons Power Button Menu + Power Buttons Disable 2. Select Yes to the OSD menu and/ or power button. Once locked, pressing any control button will display the lock icon Use the front-panel control button to the User's Guide. Select one of the following message appears. To unlock the Buttons, refer to lock the button(s). 1234 5 Operating the monitor | 33 Yes No S2421HN...
Monitor Users Guide
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... Panel Button 1 Up Down 2 1 23 Description Use the Up (increase) and Down (decrease) buttons to run the built-in diagnostics, see Built-in Diagnostics. Power Button unlock 3 Use this option to unlock OSD menu and power button to turn off the monitor. Menu and Power Button unlock 4 Use this option to unlock power button to adjust the image settings. OK Operating the monitor | 35 Built-in the OSD menu. Menu Button unlock 2 Use this option to adjust items in Diagnostics Front‑panel button Use the buttons on...
... Panel Button 1 Up Down 2 1 23 Description Use the Up (increase) and Down (decrease) buttons to run the built-in diagnostics, see Built-in Diagnostics. Power Button unlock 3 Use this option to unlock OSD menu and power button to turn off the monitor. Menu and Power Button unlock 4 Use this option to unlock power button to adjust the image settings. OK Operating the monitor | 35 Built-in the OSD menu. Menu Button unlock 2 Use this option to adjust items in Diagnostics Front‑panel button Use the buttons on...
Monitor Users Guide
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... HDMI 1 HDMI 2 Auto Select Reset Input Source Color Description Select HDMI1 input when you are using the HDMI2 connector. Use to select Auto Select, the monitor scans for available input sources. Resets your monitor's Input Source settings to adjust the color setting mode. Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Preset Modes Input Color Format Reset Color Standard RGB 38 | Operating the monitor Select HDMI2 input when you are using the HDMI1 connector. Use the Color menu to the factory defaults. Use to select the HDMI...
... HDMI 1 HDMI 2 Auto Select Reset Input Source Color Description Select HDMI1 input when you are using the HDMI2 connector. Use to select Auto Select, the monitor scans for available input sources. Resets your monitor's Input Source settings to adjust the color setting mode. Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Preset Modes Input Color Format Reset Color Standard RGB 38 | Operating the monitor Select HDMI2 input when you are using the HDMI1 connector. Use the Color menu to the factory defaults. Use to select the HDMI...
Monitor Users Guide
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... and buttons to adjust the Red, Green, and Blue values and create your monitor's color settings to 100. Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Preset Modes Input Color Format Reset Color RGB YPbPr Hue Saturation Reset Color Use or to adjust the hue from 0 to the factory defaults. 40 | Operating the monitor Allows you to a computer (or DVD player) using the HDMI cable. • YPbPr: Select this option if your DVD player supports only YPbPr output. The screen...
... and buttons to adjust the Red, Green, and Blue values and create your monitor's color settings to 100. Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Preset Modes Input Color Format Reset Color RGB YPbPr Hue Saturation Reset Color Use or to adjust the hue from 0 to the factory defaults. 40 | Operating the monitor Allows you to a computer (or DVD player) using the HDMI cable. • YPbPr: Select this option if your DVD player supports only YPbPr output. The screen...
Monitor Users Guide
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...43 Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Language Transparency Timer Lock Reset Menu Menu Buttons Power Button Menu + Power Buttons Disable Reset Menu • 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. • Disable: Press and hold the button next to the power button for four seconds to factory defaults. Icon Menu and Submenus Lock Description Controls user access to adjustments...
...43 Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Language Transparency Timer Lock Reset Menu Menu Buttons Power Button Menu + Power Buttons Disable Reset Menu • 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. • Disable: Press and hold the button next to the power button for four seconds to factory defaults. Icon Menu and Submenus Lock Description Controls user access to adjustments...
Monitor Users Guide
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... to turn off this option to adjust the monitor settings using software on . Icon Menu and Submenus Others Description Select this feature. Enable this feature for best user experience and optimum performance of your computer. Dell 24/27 Monitor Brightness/Contrast Display Info Input Source DDC/CI On Color LCD Conditioning O Display Menu Personalize Firmware Service Tag Reset Others Others Factory Reset Operating the monitor | 45 Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Display Info DDC/CI LCD Conditioning Firmware...
... to turn off this option to adjust the monitor settings using software on . Icon Menu and Submenus Others Description Select this feature. Enable this feature for best user experience and optimum performance of your computer. Dell 24/27 Monitor Brightness/Contrast Display Info Input Source DDC/CI On Color LCD Conditioning O Display Menu Personalize Firmware Service Tag Reset Others Others Factory Reset Operating the monitor | 45 Dell 24/27 Monitor Brightness/Contrast Input Source Color Display Menu Personalize Others Display Info DDC/CI LCD Conditioning Firmware...
Monitor Users Guide
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... input source. If there is not connected, a floating dialog box as shown below appears. S2421HN/S2421NX S2721HN/S2721NX Dell 24 Monitor No HDMI1 Cable The display will go into Power Save Mode in 4 minutes. S2421HN/S2421NX Dell 27 Monitor No HDMI1 signal from your device. www.dell.com/support/S2421HN www.dell.com/support/S2421NX or Dell 24 Monitor No HDMI2 Cable The display will go into Standby Mode in 4 minutes. www.dell.com/support/S2421HN www.dell.com/support...
... input source. If there is not connected, a floating dialog box as shown below appears. S2421HN/S2421NX S2721HN/S2721NX Dell 24 Monitor No HDMI1 Cable The display will go into Power Save Mode in 4 minutes. S2421HN/S2421NX Dell 27 Monitor No HDMI1 signal from your device. www.dell.com/support/S2421HN www.dell.com/support/S2421NX or Dell 24 Monitor No HDMI2 Cable The display will go into Standby Mode in 4 minutes. www.dell.com/support/S2421HN www.dell.com/support...
Monitor Users Guide
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... HDMI2 Cable The display will go into Standby Mode in 4 minutes. then turn on the monitor. While in this section, follow the Safety instructions. To ensure proper Self-Test operation, remove all video cables from the back of the procedures in self-test mode, the power LED remains white. www.dell.com/support/S2421HN www.dell.com/support/S2421NX S2421HN/S2421NX www.dell.com/support/S2721HN www.dell.com/support/S2721NX S2721HN/S2721NX 4. Troubleshooting...
... HDMI2 Cable The display will go into Standby Mode in 4 minutes. then turn on the monitor. While in this section, follow the Safety instructions. To ensure proper Self-Test operation, remove all video cables from the back of the procedures in self-test mode, the power LED remains white. www.dell.com/support/S2421HN www.dell.com/support/S2421NX S2421HN/S2421NX www.dell.com/support/S2721HN www.dell.com/support/S2721NX S2721HN/S2721NX 4. Troubleshooting...
Monitor Users Guide
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... seconds, a menu appears on the screen. 3. Troubleshooting | 51 Press Button 1 on the surface of the screen changes to green, blue, black, white, and text screens. If you use the previous procedure, check your video controller and computer, because your monitor is functioning properly. Press and hold Button 4 for abnormalities. 5. Repeat steps 5 to 6 to inspect the display when it changes to red. 6. To exit, press Button 1 again. Inspect the display for any screen abnormalities...
... seconds, a menu appears on the screen. 3. Troubleshooting | 51 Press Button 1 on the surface of the screen changes to green, blue, black, white, and text screens. If you use the previous procedure, check your video controller and computer, because your monitor is functioning properly. Press and hold Button 4 for abnormalities. 5. Repeat steps 5 to 6 to inspect the display when it changes to red. 6. To exit, press Button 1 again. Inspect the display for any screen abnormalities...
Monitor Users Guide
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...information on Dell Monitor Quality and Pixel Policy, see Dell Support site at : www.dell.com/support/monitors. Stuck-on -off is a natural defect that the correct input source is permanently off . Brightness Problems Picture too dim • Reset the monitor to factory settings. No Video/ No picture or no • Increase brightness and contrast controls Power LED on brightness through OSD. 52 | Troubleshooting bright spots • Pixel that is selected in the Input Source menu. Missing Pixels LCD screen has • Cycle power on Pixels LCD screen has...
...information on Dell Monitor Quality and Pixel Policy, see Dell Support site at : www.dell.com/support/monitors. Stuck-on -off is a natural defect that the correct input source is permanently off . Brightness Problems Picture too dim • Reset the monitor to factory settings. No Video/ No picture or no • Increase brightness and contrast controls Power LED on brightness through OSD. 52 | Troubleshooting bright spots • Pixel that is selected in the Input Source menu. Missing Pixels LCD screen has • Cycle power on Pixels LCD screen has...
Monitor Users Guide
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... Custom Color in Color menu OSD. • Change the Input Color Format to the computer is connected properly & off the monitor at all times when not in the video cable connector. Issues smoke or sparks • Contact Dell immediately. Troubleshooting | 53 Intermittent Problems Monitor • Ensure that the video cable connecting the monitor to the computer is connected properly and is secure. • Reset the monitor to factory settings. • Perform monitor self-test feature check to turn...
... Custom Color in Color menu OSD. • Change the Input Color Format to the computer is connected properly & off the monitor at all times when not in the video cable connector. Issues smoke or sparks • Contact Dell immediately. Troubleshooting | 53 Intermittent Problems Monitor • Ensure that the video cable connecting the monitor to the computer is connected properly and is secure. • Reset the monitor to factory settings. • Perform monitor self-test feature check to turn...
Monitor Users Guide
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... screen • Turn off the monitor, unplug the monitor power cable, plug it back, and then turn on the monitor. No Input Signal when user controls are pressed No picture, the LED light is white • Check the signal source. Connect the signal cable again, if necessary. • Reset the computer or video player. not fill entire viewing • Reset the monitor to different video formats (aspect ratio) does not fill the fill the height or of DVDs, the monitor may display...
... screen • Turn off the monitor, unplug the monitor power cable, plug it back, and then turn on the monitor. No Input Signal when user controls are pressed No picture, the LED light is white • Check the signal source. Connect the signal cable again, if necessary. • Reset the computer or video player. not fill entire viewing • Reset the monitor to different video formats (aspect ratio) does not fill the fill the height or of DVDs, the monitor may display...
Monitor Display Manager Users Guide
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... adjustment of the displayed image, assignment of displays. Dell S2421HN/S2421NX - After installed, Dell Display Manager runs each time the system starts and places its icon in the menu as below. Overview Dell Display Manager is available when hovering over the notification-tray icon. Dell 24/27 Monitor Brightness/Contrast Display Info Input Source DDC/CI On Color LCD Conditioning O Display Menu Personalize Firmware Service Tag Reset Others Others Factory Reset 4 | Overview Standard S2421HN/S2421NX Dell S2721HN/S2721NX - Information about displays connected...
... adjustment of the displayed image, assignment of displays. Dell S2421HN/S2421NX - After installed, Dell Display Manager runs each time the system starts and places its icon in the menu as below. Overview Dell Display Manager is available when hovering over the notification-tray icon. Dell 24/27 Monitor Brightness/Contrast Display Info Input Source DDC/CI On Color LCD Conditioning O Display Menu Personalize Firmware Service Tag Reset Others Others Factory Reset 4 | Overview Standard S2421HN/S2421NX Dell S2721HN/S2721NX - Information about displays connected...
Monitor Display Manager Users Guide
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When more than one supported Dell displays are connected to open the Quick Settings dialog box. The Quick Settings dialog box enables convenient adjustment of the display's brightness, contrast, resolution, window layout, and so on. You can select Manual Mode or Auto Mode, and the screen resolution can be changed. Dell S2421HN/S2421NX S2421HN/S2421NX Using the Quick Settings Dialog | 5 Using the Quick Settings Dialog Clicking Dell Display Manager's notification tray icon to the computer, a specific target display can be selected using the menu.
When more than one supported Dell displays are connected to open the Quick Settings dialog box. The Quick Settings dialog box enables convenient adjustment of the display's brightness, contrast, resolution, window layout, and so on. You can select Manual Mode or Auto Mode, and the screen resolution can be changed. Dell S2421HN/S2421NX S2421HN/S2421NX Using the Quick Settings Dialog | 5 Using the Quick Settings Dialog Clicking Dell Display Manager's notification tray icon to the computer, a specific target display can be selected using the menu.