Dell 24 Monitor - P2421D User’s Guide Monitor Model: P2421D Regulatory Model: P2421Dc
NOTE: A NOTE indicates important information that helps you make better use of your computer. 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 About your monitor . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Package contents . . . . . . . . . . . . . . . . . . . . . . 6 Product features . . . . . . . . . . . . . . . . . . . . . . 8 Identifying parts and controls . . . . . . . . . . . . . . . 10 Front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Back view . . . . . . . . . . . . . . . . . . . . .
Connecting the DP and USB 3.0 cable . . . . . . . . . . . . . . . 27 Organizing cables . . . . . . . . . . . . . . . . . . . . . 28 Removing the stand . . . . . . . . . . . . . . . . . . . . 29 Wall mounting (optional) . . . . . . . . . . . . . . . . . 30 Operating your monitor . . . . . . . . . . . . . . . . . . . . . . 31 Power on the monitor . . . . . . . . . . . . . . . . . . . .
Common problems . . . . . . . . . . . . . . . . . . . . . 58 Product-specific problems . . . . . . . . . . . . . . . . .61 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 Safety Instructions . . . . . . . . . . . . . . . . . . . . . 62 FCC notices (U.S. Only) and other regulatory information 62 Contacting Dell . . . . . . . . . . . . . . . . . . . . . . .
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 for more information 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.
DP 1.2 cable (1.8 m length) USB 3.0 upstream cable (enables the USB ports on the monitor, 1.
Product features The Dell P2421D monitor has an active matrix, Thin-Film Transistor (TFT), Liquid Crystal Display (LCD), anti-static, and LED backlight. The monitor features include: ∞∞ 60.45 cm (23.8 in.) viewable area display (measured diagonally). 2560 x 1440 resolution, with full-screen support for lower resolutions. ∞∞ Wide viewing angle to allow viewing from a sitting or standing position, or while moving from side-to-side. ∞∞ Color gamut of 99% sRGB. ∞∞ High Dynamic Contrast Ratio.
WARNING: The possible long-term effects of blue light emission from the monitor may cause damage to the eyes, including eye fatigue, digital eye strain, and so on. ComfortView feature is designed to reduce the amount of blue light emitted from the monitor to optimize eye comfort.
Identifying parts and controls Front view 1 2 Control buttons Label Description Use 1 Function buttons Use the function buttons to adjust items in the OSD menu. (For more information, see Using the control buttons) 2 Power On/Off button (with power-status light) To turn the monitor on or off. Solid white light indicates the monitor is turned on and functioning normally. Blinking white light indicates the monitor is in Standby Mode.
Back view 2 3 4 DELL P2421D Flat Panel Monitor /Monitor Plano Panel /Moniteur écran plat /⏢Ღ亟⽪ಘ Model No. /Modelo /N°de modelo /ර㲏: P2720Dc Input Ra ng /Entrade /Daya Tegangan:100-240V 50/60Hz,1.6A 䕨ޕ䴫Ⓚ Ӕ⍱䴫༃100-240Կ⢩,1.6ᆹษ,50/60䎛㥢 Consumo de energía en operación: xxxxx Wh Удельная мощность рабочего режима - xxxx Вт/см² Потребляемая мощность изделием в режиме ожидания - xx Вт Потребляемая мощность изделием в выключенном режиме - xx Вт Apparatet må lkoples jordet s kkontakt.
Side view 1 Label Description Use 1 Connect your USB device. USB 3.0 downstream port x 2 12 │ About your monitor NOTE: To use this port, you must connect the USB cable (shipped with your monitor) to the USB-upstream port on the monitor and to your computer.
Bottom view 1 2 3 4 5 6 7 Bottom view without monitor stand Label Description Use 1 Power connector Connect the power cable (shipped with your monitor). 2 Security-lock slot Secure your monitor using a security lock (purchased separately) to prevent unauthorized movement of your monitor. 3 Stand lock feature To lock the stand to the monitor using a M3 x 6 mm screw (screw not included). 4 HDMI port Connect your computer with HDMI cable.
Monitor specifications Model P2421D Screen type Active matrix-TFT LCD Panel type In-Plane Switching Technology Viewable image Diagonal 604.5 mm (23.8 in.) Horizontal, Active Area 526.85 mm (20.75 in.) Vertical, Active Area 296.35 mm (11.67 in.) Area 156132.00 mm2 (242.16 in.2) Pixel pitch 0.2058 mm x 0.
Bezel width (edge of monitor to active area) Top 5.4 mm Left/Right 5.5 mm Bottom 20.
Preset display modes Display Mode Horizontal Frequency (kHz) Vertical Frequency (Hz) Pixel Clock (MHz) Sync Polarity (Horizontal / Vertical) VESA, 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 VESA, 1280 x 768 VESA, 1280 x 1024 VESA, 1280 x 1024 VESA, 1600 x 1200 VESA, 1680 x 1050 VESA, 1920 x 1080 VESA, 1920 x 1200 VESA, 2048 x 1080 VESA, 2560 x 1440 31.5 31.5 37.5 37.9 46.9 48.4 60.0 67.5 47.8 64.0 79.9 75.0 65.3 67.
Electrical specifications Model P2421D Video input signals HDMI 1.4, 600 mV for each differential line, 100 ohm input impedance per differential pair DP 1.2, 600 mV for each differential line, 100 ohm input impedance per differential pair AC input voltage/ frequency/current 100 VAC to 240 VAC / 50 Hz or 60 Hz ± 3 Hz / 1.6 A (typical) Inrush current 120 V: 30 A (Max.) at 0 °C (cold start) 240 V: 60 A (Max.) at 0 °C (cold start) Power 0.2 W (Off Mode)1 Consumption 0.2 W (Standby Mode)1 16.
Physical characteristics Model P2421D Signal cable type ∞∞ Digital: DP, 20 pins ∞∞ Universal Serial Bus: USB, 9 pins Dimensions (with stand) Height (extended) 486.1 mm (19.14 in.) Height (compressed) 356.1 mm (14.02 in.) Width 537.8 mm (21.17 in.) Depth 166.0 mm (6.54 in.) Dimensions (without stand) Height 322.1 mm (12.68 in.) Width 537.8 mm (21.17 in.) Depth 42.7 mm (1.68 in.) Stand dimensions Height (extended) 400.8 mm (15.78 in.) Height (compressed) 353.4 mm (13.91 in.) Width 206.
Environmental characteristics Model P2421D Compliant Standards ∞∞ ENERGY STAR certified monitor ∞∞ EPEAT registered where applicable. EPEAT registration varies by country. See www.epeat.net for registration status by country. ∞∞ TCO-certified display. ∞∞ RoHS-compliant ∞∞ BFR/PVC free monitor (excluding external cables) ∞∞ Meets NFPA 99 leakage current requirements. ∞∞ Arsenic-free glass and Mercury-free for the panel only ∞∞ Energy Gauge shows the energy level being consumed by the monitor in real time.
DisplayPort connector 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 GND 14 GND 15 AUX (p) 16 GND 17 AUX (n) 18 Hot Plug Detect 19 Re-PWR 20 +3.
Universal serial bus (USB) interface This section gives you information about the USB ports that are available on the monitor. NOTE: This monitor is Super-Speed USB 3.0 and High-Speed USB 2.0 compatible. Transfer Speed Super-speed Data Rate 5 Gbps Power Consumption* 4.5 W (Max, each port) High speed 480 Mbps 4.5 W (Max, each port) Full speed 12 Mbps 4.5 W (Max, each port) Transfer Speed High speed Data Rate 480 Mbps Power Consumption* 2.5 W (Max, each port) Full speed 12 Mbps 2.
8 SSRX- 9 SSRX+ USB 3.
USB 2.0 downstream connector Pin Number 1 4-pin Side of the Connector VCC 2 DMD 3 DPD 4 GND USB ports • 1 x USB 3.0 upstream - bottom • 2 x USB 2.0 downstream - bottom • 2 x USB 3.0 downstream - side NOTE: USB 3.0 functionality requires a USB 3.0-capable computer. NOTE: The monitor’s USB interface works only when the monitor is On or in the Standby Mode. If you turn Off the monitor and then turn it On, the attached peripherals may take a few seconds to resume normal functionality.
Plug and play capability 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 system 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 your monitor.
Setting up the monitor Attaching the stand NOTE: The stand is detached when the monitor is shipped from the factory. NOTE: This is applicable for a monitor with a stand.If you have purchased a third-party stand refer to the respective stand setup guide for the set up instructions. To attach the monitor stand. 1. Follow the instructions on the flaps of carton to remove the stand from the top cushion that secures it. 2. Insert the stand base blocks fully into the stand slot. 3.
6. Attach the stand assembly to the monitor. a. Fit the two tabs on the upper part of the stand to the groove on the back of the monitor. b. Press the stand down till it snaps into place. 1 2 7. Place the monitor upright.
Connecting your monitor WARNING: Before you begin any of the procedures in this section, follow the Safety Instructions. NOTE: Do not connect all cables to the computer at the same time. It is recommend to route the cables through the cable-management slot before you connect them to the monitor. To connect your monitor to the computer: 1. Turn Off your computer and disconnect the power cable. 2. Connect the DP cable from your monitor to the computer. Connecting the DP and USB 3.0 cable USB DP USB DP 1.
Organizing cables Use the cable-management slot to route the cables connected to your monitor.
Removing the stand NOTE: To prevent scratches on the screen when removing the stand, ensure that the monitor is placed on a soft and clean surface. NOTE: The following procedure is applicable only for the stand that shipped with your monitor. If you are connecting a third-party stand, see the documentation that shipped with the stand. To remove the stand: 1. Place the monitor on a soft cloth or cushion. 2. Press and hold the stand release button. 3. Lift the stand up and away from the monitor.
Wall mounting (optional) (Screw dimension: M4 x 10 mm). See the documentation that shipped with the VESA-compatible wall mounting kit. 1. Lay the monitor on a soft cloth or cushion at the edge of the desk. 2. Remove the stand. See Removing the stand for details. 3. Remove the four screws that secure the panel to the monitor. 4. Attach the mounting bracket from the wall mounting kit to the monitor. 5. To mount the monitor on the wall, see the documentation that shipped with the wall mounting kit.
Operating your monitor Power on the monitor Press the button to turn on the monitor.
Using the control buttons Use the control buttons at the front of the monitor to adjust the settings on your monitor. 1 2 3 4 5 Control buttons The following table describes the control buttons Control Buttons 1 Description Use this button for choose from a list of preset modes. Shortcut key/Preset Modes 2 Shortcut key/Input Source 3 Menu 4 Exit 5 Use the input source menu to select between the different video signals that may be connected to your monitor.
OSD controls Use the buttons on the front of the monitor to adjust the image settings. 1 2 3 4 Control Buttons 1 Up 2 Down 3 OK 4 Description Use the Up button to increase values or move up in a menu. Use the Down button to decrease values or move down in a menu. Use the OK button to confirm your selection in a menu. Use the Back button to go back to the previous menu.
Using the On-Screen Display (OSD) menu Accessing the OSD menu NOTE: Any changes you make are automatically saved when you move to another menu, exit the OSD menu, or wait for the OSD menu to automatically close. 1. Press the button to display the OSD main menu. Dell 24 Monitor Brightness / Contrast Input Source Color 75% Display Menu 75% Personalize Others 2. Press the and buttons to move between the setting options. As you move from one icon to another, the option is highlighted. 3. Press the 4.
Icon Menu and SubDescription menus Brightness/ Use this menu to activate Brightness/Contrast adjustContrast ment. Dell 24 Monitor Brightness / Contrast Input Source Color 75% Display Menu 75% Personalize Others Brightness Contrast Brightness adjusts the luminance of the backlight. Press the button to increase the brightness and press the button to decrease the brightness (min. 0 / max. 100). Adjust the brightness first, and then adjust the contrast only if further adjustment is necessary.
Input Source Use the input source menu to select between the different video signals that may be connected to your monitor. Dell 24 Monitor Brightness / Contrast DP Input Source HDMI Color Auto Select Display Reset Input Source On Menu Personalize Others DP HDMI Auto Select Reset Input Source Color Select DP input when you are using the DP connector. Push to select the DP input source. Select HDMI input when you are using the HDMI connector. Push to select the HDMI input source.
Preset Modes When you select preset modes, you can choose Standard, Comfortview, Movie, Game, Warm, Cool, or Custom color from the list. ∞∞ Standard: Loads the monitor's default color settings. This is the default preset mode. ∞∞ ComfortView: Decreases the level of blue light emitted from the screen to make viewing more comfortable for your eyes.
Press the and buttons to adjust the three colors (R, G, B) values and create your own preset color mode. Dell 24 Monitor Brightness / Contrast Preset Modes Standard Input Source Input Color Format ComfortView Color Reset Color Movie Display Game Menu Warm Cool Personalize Custom Color Others Input Color Format 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 cable.
Saturation This feature can adjust the color saturation of the video image. Use or to adjust the saturation from 0 to 100. Press to increase the monochrome appearance of the video image. Reset Color Display Press to increase the colorful appearance of the video image. NOTE: Saturation adjustment is available only when you select Movie and Game mode. Allows your monitor color settings to the factory settings. Use the display to adjust image.
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.
Personalize Select this option to adjust the settings of the personalization. Dell 24 Monitor Brightness / Contrast Shorout Key 1 Input Source Shorout Key 2 Input Source Color Power Button LED On in On Mode Display USB Off in Standby Mode Menu Preset Modes Reset Personalization Personalize Others Shortcut Key 1 User can select one of the following: Preset Modes, Brightness/Contrast, Input Source, Aspect Ratio, Rotation to set the shortcut key 1.
Power Button Allows you to set the power LED indicator On in On LED Mode or Off in On Mode to save energy. Dell 24 Monitor Brightness / Contrast Shorout Key 1 Input Source Shorout Key 2 Color Power Button LED On in On Mode Display USB Off in On Mode Menu Reset Personalization Personalize Others USB Allows you to enable or disable USB function during monitor standby mode. NOTE: USB ON/OFF under standby mode is only available when USB upstream cable unplugged.
Others Select this option to adjust the OSD settings, such as the DDC/CI, LCD conditioning, and so on. Dell 24 Monitor Display Info Brightness / Contrast Display Info Input Source DDC/CI Color LCD Conditioning Off Display Firmware 12C104 Menu Service Tag Personalize Reset Others Others Factory Reset On G469XX2 ENERGY STAR® Displays the monitor’s current settings.
Firmware Display the version of the firmware about the display. Service Tag Display the service tag number of the display. 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. Reset Others Reset all settings under the others setting menu to the factory preset values.
Menu and Power button lock Controls user access to adjustments. The default setting of Menu and Power buttons lock is Disable. 2 1 3 4 5 To enter the lock menu: Hold the Exit key (button 4) for 4 seconds to display the lock menu (when Menu and Power buttons unlocked), A lock menu appears and is shown on the bottom right corner of display screen.
There are three levels of lock. 1 Menu Menu Buttons Description When “Menu Buttons” is selected, no user adjustments are allowed. All buttons are locked except Power button. 2 Power Button When “Power Button” is selected, user is now not able to turn off the display via Power button. 3 Menu + Power Buttons When “Menu + Power Buttons” is selected, no user adjustments are allowed and the Power button is locked. + 4 Built-in Diagnostics See Built-in diagnostics for more information.
OSD warning messages When you adjust the Brightness level for the first time, the following message appears: Dell 24 Monitor Adjusting to this value will increase power consumption above the default level. Do you want to continue? No Yes P2421D NOTE: If you select Yes, the message will not appear next time when you intend to change the Brightness setting.
frequency ranges addressable by this monitor. Recommended mode is 2560 x 1440. Before the DDC/CI function is disabled, the following message is displayed: Dell 24 Monitor The function of adjusting display setting using PC application will be disabled. Do you wish to disable DDC/CI function? Yes No P2421D When the monitor enters the Standby Mode, the following message appears: Dell P2418HZ Dell 24 Monitor Going into Standby Mode...
Dell P2418HZ Dell 24 Monitor ? No HDMI Cable The display will go into Standby Mode in 4 minutes. www.dell.com/P2421D P2421D or Dell P2418HZ Dell 24 Monitor ? No DP Cable The display will go into Standby Mode in 4 minutes. www.dell.com/P2421D P2421D The OSD functions only in the normal operation mode. When any button is pressed in Standby Mode, the following message will be displayed: Dell P2418HZ Dell 24 Monitor ? No HDMI signal from your device.
Setting up your monitor Setting the maximum resolution To set the maximum resolution for the monitor: In Windows 7, Windows 8, Windows 8.1 and Windows 10: 1. For Windows 8 and Windows 8.1 only, select the Desktop tile to switch to classic desktop. 2. Right-click on the desktop and click Screen Resolution. 3. Click the Dropdown list of the Screen Resolution and select 2560 x 1440. 4. Click OK. If you do not see 2560 x 1440 as an option, you may need to update your graphics driver.
If you have a non Dell desktop, portable computer, or graphics card In Windows 7, Windows 8, Windows 8.1 and Windows 10: 1. For Windows 8 and Windows 8.1 only, select the Desktop tile to switch to classic desktop. 2. Right-click on the desktop and click Personalization. 3. Click Change Display Settings. 4. Click Advanced Settings. 5. Identify your graphics controller supplier from the description at the top of the window (e.g. NVIDIA, ATI, Intel, and so on). 6.
Using the tilt, swivel, and vertical extension NOTE: These values are applicable to the stand that was shipped with your monitor. To set up with any other stand, see the documentation that shipped with the stand. Tilt, Swivel With the stand attached to the monitor, you can tilt and swivel the monitor for the most comfortable viewing angle. 5° 45° 21° 45° NOTE: The stand is detached when the monitor is shipped from the factory. Vertical Extension NOTE: The stand can be extended vertically up to 130 mm.
Rotating the Monitor Before you rotate the monitor, your monitor should be fully vertically extended (Vertical Extension) and fully tilted up to avoid hitting the bottom edge of the monitor. 1 2 90° 90° 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.
NOTE: When in the Portrait View Mode, you may experience performance degradation in graphic-intensive applications (3D Gaming and etc.). 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.
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 if 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. Disconnect all video cables from the monitor.
4. Turn Off your monitor and reconnect the video cable; then turn on your computer and the monitor. If your monitor remains dark after you reconnect the cables, check your video controller and computer. Built-in diagnostics Your monitor has a built-in diagnostic tool that helps you determine if any screen abnormality you experience is an inherent problem with your monitor, or with your computer and video card.
Dell 24 Monitor Select Option: + Dell 24 Monitor Select Option: 4. Select the icon to enable the built-in diagnostics. 5. Carefully inspect the screen for abnormalities. 6. Press the Up key (button 1) on the back cover again. The color of the screen changes to grey. 7. Inspect the display for any abnormalties. 8. Repeat step 6 and 7 to inspect the display in red, green, blue, black, white and text pattern screens. The test is complete when the text pattern screen appears.
Common problems The following table contains general information about common monitor problems you might encounter and the possible solutions: Common Symptoms Possible Solutions No Video/Power LED off ∞∞ 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 pressed.
Stuck-on Pixels ∞∞ Cycle power On-Off. ∞∞ 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. Brightness Problems ∞∞ Reset the monitor to Factory Settings (Factory Reset). ∞∞ Adjust brightness & contrast controls via OSD. Geometric Distortion ∞∞ Reset the monitor to Factory Settings (Factory Reset). ∞∞ Adjust horizontal & vertical controls via OSD.
Wrong Color ∞∞ Change the Color Setting Mode in the Color Settings OSD to Graphics or Video depending on the application. ∞∞ Try different Preset Modes in Color settings OSD. Adjust R/G/B value in Custom Color in Color settings OSD. ∞∞ Change the Input Color Format to RGB or YPbPr in the Color settings OSD. ∞∞ Run the built-in diagnostics. Image retention from ∞∞ Set the screen to turn off after a few minutes of screen a static image left idle time.
Product-specific problems Specific Symptoms Possible Solutions Screen image is too ∞∞ Check the Aspect Ratio setting in the Display settings small OSD. ∞∞ Reset the monitor to Factory Settings (Factory Reset). Cannot adjust the ∞∞ Turn Off the monitor, unplug the power cord, plug it back, monitor with the and then turn On the monitor. buttons on the ∞∞ Check if the OSD menu is locked. If yes, press and hold bottom of the panel the menu button for 4 seconds to unlock.
Appendix Safety Instructions WARNING: 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. For information on safety instructions, see the Safety Environment and Regulatory Information (SERI). 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. 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. To get online Monitor support content: 1. Visit www.dell.com/support/monitors.
