Dell P2423D Monitor Usage and Troubleshooting Guide

摘要: Learn how to use and troubleshoot issues that are related to the Dell P2423D Monitor.

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說明

Quick Links

Getting Started with your Dell P2423D Monitor Dell P2423D Monitor Setup, Specifications and Service Manual Dell Drivers & Downloads Warranty and Support Services Frequently asked questions

For help with video or display issues such as: no video or no display, blank or black screen, flickering, resolution or color issues, horizontal or vertical lines, so forth see the expanding section below.

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Key features of Dell P2423D Monitor

The Dell P2423D monitor has an active matrix, Thin-Film Transistor (TFT), Liquid Crystal Display (LCD) 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.
Color gamut of 99% sRGB (typical).
Digital connectivity with DisplayPort and HDMI.
Equipped with 1 USB-B upstream port and 4 SuperSpeed USB 5 Gbps (USB 3.2 Gen1) Type-A downstream ports.
plug-and-play capability if supported by your computer.
On-Screen Display (OSD) adjustments for ease of setup and screen optimization.
Power and joystick buttons lock.
Removable stand and Video Electronics Standards Association (VESA) 100 mm mounting holes for flexible mounting solutions.
Tilt, swivel, height, and rotate adjustment capabilities.
Security lock slot.
Stand lock.
≤ 0.3 W in Standby Mode
Supports Dell Display Manager.
Optimize eye comfort with a flicker-free screen and low blue light feature.
The monitor use Low Blue Light panel and compliance with TUV Rheinland (Hardware Solution) at factory reset/default setting model (Preset mode: Standard).

Warning: The possible long-term effects of blue light emission from the monitor may damage your eyes, including eye fatigue or digital eye strain. ComfortView feature is designed to reduce the amount of blue light that is emitted from the monitor to optimize eye comfort.

Warning: Do not mount this monitor in vertical orientation due to the risk of damaging the monitor.

Dell P2423D Monitor Specifications

This section provides some specifications of the Dell P2423D monitor. To learn more about the specifications of Dell P2423D monitor, see the User's Guide at the Dell Manuals website.

Screen type	Active matrix - TFT LCD
Panel technology	In-Plane Switching
Maximum resolution	2560 x 1440 at 60 Hz (16:9 aspect ratio)
Viewing angle	178° (vertical) typical 178° (horizontal) typical
Contrast ratio	1000 to 1 (typical)
Response time	8 milliseconds (Normal) 5 milliseconds (Fast)
Color gamut	sRGB 99% (typical)
Color depth	16.7 million colors (8 bit)
Ports and connectors	1 x HDMI 1.4 (HDCP 1.4) 1 x DisplayPort 1.2 (HDCP 1.4) 1 x USB 3.2 Gen1 upstream 4 x SuperSpeed USB 5 Gbps (USB 3.2 Gen1) downstream

Setting up your Dell P2423D Monitor

Ensuring that your Dell monitor is set up properly. Assembling the monitor stand and setting up the monitor ergonomically. Connecting the cables and organizing them. These will only help make the viewing experience the best it possibly can be.

Attaching the stand

The standard monitor stand is detached when the monitor is shipped from the factory. To learn more about attaching the standard monitor stand. See the Setting Up the Monitor section in the User's Guide of your Dell P2423D monitor.
To learn how to set up any other stand with a monitor, see the respective stand setup guide for setup instructions.

Caution: Do not remove the monitor from the packaging box before attaching the stand.

Note: The Dell P2423D monitor is heavy; handle with extreme care. It is recommended to have two people to lift or move this monitor.

Ergonomics

Where you put your monitor is almost as important as what model you buy. The monitor should be directly in front of you, at an arm’s length away (between 20-40 inches from your eyes). The top edge of the screen at eye level when you are sitting comfortably. You may need to adjust your chair height or the height of the monitor to achieve this.

Connecting your monitor to the personal computer

To connect your Dell P2423D monitor to your personal computer:

Turn off your personal computer and disconnect the power cable.

Connect the DisplayPort, HDMI, or USB Type-C cable to the corresponding video or display port on the back of your personal computer.

Note: Dell P2423D supports display over USB Type-C port with Alternate mode DP 1.4. Ensure that the USB Type-C on your personal computer supports Alternate mode DP 1.2 or above.

To learn more about connecting your monitor to the personal computer, see the Dell knowledge-base article: How do I connect a monitor to a personal computer?

Connect the USB upstream cable to the monitor and personal computer.

Dell P2423D monitor orientation

Dell P2423D monitor orientation must always be in landscape mode. This includes any wall-mounted monitors and monitors on a stand. In a multiple monitor setup, Dell P2423D should not be rotated to 180° (landscape). The monitors supports 90° (portrait) orientation.

Caution: Dell P2423D setup must comply with the recommended panel orientation and working angle only. Setting up the monitor in an orientation that is not recommended may damage the monitor and/or cause a safety hazard.

When setting up your Dell P2423D monitor, ensure that the monitor front panel buttons is on the bottom right.

Using the tilt, swivel, and vertical extension

Note: This is applicable for a monitor with a stand. When any other stand is bought, please see the respective stand setup guide for set-up instructions.

With the stand that is attached to the monitor, you can tilt and swivel the monitor for the most comfortable viewing angle.

Figure 1: Using tilt and swivel extension on Dell P2423D monitor

Note: The stand assembly is not preinstalled when the monitor is shipped from the factory.

Using the vertical extension

When mounted on the wall or on a monitor arm, the set-up must comply with the recommended panel orientation and working angle.

Figure 2: Using vertical extension on Dell P2423D monitor

Warning: The monitor should not be rotated 180° (landscape).

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.

Figure 3: Rotating the Dell P2423D monitor

Rotate clockwise

Figure 4: Dell P2423D monitor clockwise rotation.

Rotate counterclockwise

Figure 5: Dell P2423D monitor counterclockwise rotation.

Note: When in the Portrait View Mode, you may experience performance degradation in graphic-intensive applications (3D Gaming and so forth).

Using the On-Screen Display (OSD) Menu

Use the joystick control on the rear of the monitor to make OSD adjustments.

Learn more about using the On-Screen Display (OSD) menu. See the Operating Your Monitor section in the User's Guide of Dell P2423D monitor.

Note: Any changes that you make are automatically saved. Whenever you move to another menu item, exit the OSD menu, or wait for the OSD menu to automatically close.

Figure 6: Dell P2423D Power Button and Joystick Control

Button	Function	Description
Joystick Control	Controls to make adjustments to the On-Screen Display.	Press the joystick to launch the OSD Menu Launcher. Move the joystick up/down/left/right to toggle between options. Press the joystick again to confirm the selection.

Reset Dell P2423D Monitor to Factory Settings

Resetting a monitor to factory defaults can help resolve many video or display issues. To reset your Dell P2423D monitor to factory default settings, follow these instructions:

Press the joystick on the monitor to enter the On-Screen Display (OSD) Menu.
Press up or down on the joystick to highlight Other option in the menu and press on the joystick to select.
Press up or down to highlight Factory Reset option in the menu and press on the joystick to select.
Press the joystick to confirm the reset action.

Figure 7: Dell P2423D Monitor Factory Reset Setting

Running Diagnostics on Dell P2423D Monitor

If your Dell monitor has a blank or black screen, fuzzy or blurry image, flickering, distorted or any other screen abnormalities, running a diagnostic test helps determine if the Dell monitor is functioning normally. To learn more about diagnostic options on a Dell monitor, see the Dell knowledge-base article: How do I run diagnostics on a Dell monitor?

It is always essential to isolate the monitor while troubleshooting your computer for the following scenarios:

No Power - Your computer is not powering ON or showing any signs of power.

No POST - Your computer is not showing any indication of activity, the screen might be blank and will not display the Dell logo during start-up.

No Video - You are unable to see any display on the screen, able to hear the windows chime but no display is seen.

Self-Test Feature Check
Built-In Self-Test

Your Dell P2423D Monitor provides a self-test feature check that allows you to check whether the monitor is functioning properly. If the monitor and computer are properly connected but the monitor screen remains dark, run the monitor self-test by performing the following steps:

Turn off both your computer and the monitor.
Unplug the video cable from the back of the computer. To ensure proper Self-Test operation, remove the video cables (VGA, DVI, HDMI, or DisplayPort) from the back of the computer.
Turn on the monitor.
Turn off your monitor and reconnect the video cable: Then turn on both your computer and the monitor.
If your monitor screen remains blank after you use the previous procedure, check your video card (GPU) and computer, because your monitor is functioning properly.

Your Dell P2423D monitor has a built-in diagnostic tool. It helps to determine if the screen abnormality you are experiencing is a problem with the monitor or with the video card on your computer.

When you notice screen abnormalities like distortion, clarity, horizontal or vertical lines, color fade, it is always a good practice to isolate the monitor by running the Built-In Diagnostics.

Ensure that the screen is clean (no dust particles on the surface of the screen).
Unplug the video cables from the back of the computer or the monitor. The monitor will now enter self-test mode.
On the front panel, press and hold Button 2 on the front panel for 5 seconds. A gray screen appears.
Carefully inspect the screen for abnormalities.
Press Button 2 on the front panel again. The color of the screen changes to red.
Inspect the display for any abnormalities.
Repeat step 5 and step 6 to inspect the display in green, blue, black, white, and text screens.
The test is complete when the white screen appears.
Press Button 2 to exit the Built-In Self-Test diagnostics.

Note: If you do not detect any screen abnormalities upon using the built-in diagnostic tool, the monitor is functioning properly. Check the video card (GPU) and the computer.
If you notice any abnormalities during Built-In Diagnostics, you may get the monitor repaired or replaced if it is under warranty by contacting Dell Technical Support.

Dell LCD Monitor Pixel Guidelines

During the LCD Monitor manufacturing process, it is not uncommon for one or more pixels to become fixed in an unchanging state. Which is hard to see and do not affect the display quality or usability. For more information, see the Dell knowledge-base article Dell LCD Monitor Pixel Guidelines.

Common Troubleshooting Steps

This section provides information about troubleshooting steps that can help resolve the most common issues with the Dell P2423D monitor. Alternatively, to learn more about troubleshooting common issues on Dell monitors, see the Dell knowledge-base article Troubleshooting Display or Video Issues on a Dell Monitor or use our Monitor self-help Guide.

Common Problem	What User Experiences	Possible Solution
No Video - Power LED Off	No picture	Ensure that the power cable connecting the monitor 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. Test with known good cable and known good computer if possible.
No Video - Power LED On	No picture or no brightness.	Increase the brightness and contrast of the monitor through On-Screen Display Menu (OSD). Perform monitor self-test feature check. Check for bent or broken pins in the video cable connector. Reseat both ends of video cable. Try with known good video cable. Run the built-in diagnostics. Ensure that the correct input source is selected over the Input Source Select button. Test monitor with known good computer if available.
Poor Focus	Picture is fuzzy, blurry, or ghosting.	Reseat both ends of video cable. Try with known good video cable. Perform Auto Adjust over On-Screen Display Menu (OSD). Adjust the Phase and Pixel Clock controls over On-Screen Display Menu (OSD). Eliminate video extension cables. Reset the monitor to Factory Settings.
Shaky or Jittery Video	Wavy picture or fine movement.	Perform Auto Adjust over On-Screen Display Menu (OSD). Adjust the Phase and Pixel Clock controls over On-Screen Display Menu (OSD). Reset the monitor to Factory Settings. Check for environmental factors (like fans or other sources of interference). Relocate the monitor and test it in another room.
Missing Pixels	LCD screen has spots.	Cycle power on-off. Pixel that is permanently off is a natural defect that can occur in LCD technology. Run the built-in diagnostics.
Stuck-On/Off Pixels	LCD screen has bright spot.	Cycle power on-off. A few permanently bright or dark pixels are considered normal by industry standards. The exact number of pixels that are allowed varies depending on the monitor. See the Dell Monitor Quality and Pixel Policy for more details. Run the built-in diagnostics.
Brightness Problems	Picture too dim or too bright.	Dim or discolored video can be caused by the video cable, so try reseating the cable and swapping with a known good part. Reset the monitor to the Factory Settings. Perform Auto Adjust over On-Screen Display Menu (OSD). Adjust the Brightness and Contrast controls over the On-Screen Display Menu (OSD).
Geometric Distortion	Screen not centered correctly.	Reset the monitor to Factory Settings. Perform Auto Adjust over On-Screen Display Menu (OSD). Adjust the Brightness and Contrast controls through the On-Screen Display Menu (OSD). NOTE: When using DisplayPort input, the positioning adjustments are not available.
Horizontal or Vertical Lines	Screen has one or more lines.	Reset the monitor to the Factory Settings. Perform Auto Adjust over On-Screen Display Menu (OSD). Adjust Phase and Pixel Clock controls over On-Screen Display Menu (OSD). Perform monitor self-test feature check and determine if these lines are also in self-test mode. Check for bent or broken pins in the video cable connector. Run the built-in diagnostics. NOTE: When using DisplayPort input, the positioning adjustments are not available.
Synchronization Problems	Screen is scrambled or appears torn.	Reset the monitor to the Factory Settings. Perform Auto Adjust over On-Screen Display Menu (OSD). Adjust Phase and Pixel Clock controls over On-Screen Display Menu (OSD). Perform monitor self-test feature check to determine if the scrambled screen appears in self-test mode. Check for bent or broken pins in the video cable connector. Restart the computer in the power safe mode.
Safety-Related Issues	Visible signs of smoke or sparks.	Do not perform any troubleshooting steps. Contact Dell Technical Support immediately.
Intermittent Problems	Monitor malfunctions on and off.	Ensure that the video cable is connected properly with the monitor and the computer. Reset the monitor to the Factory Settings. Run the self-test feature and determine if the intermittent problem occurs in the self-test mode.
Missing Color	Picture does not have color.	Run the monitor self-test feature check. Ensure that the video cable connecting the monitor to the computer is connected properly and is secure. Check for bent or broken pins in the video cable connector.
Wrong Color	Picture color is not good.	Change the color-setting mode in the Color Settings On-Screen Display Menu (OSD) to Graphics or Video, depending on the application. Try a different color preset setting in the Color Settings On-Screen Display Menu (OSD). Adjust the R, G, B value in the Color Settings OSD, if Color Management is turned off. Change the input color format to personal computer RGB or YPbPr in the Color Settings On-Screen Display Menu (OSD). Run the built-in diagnostics.
Image Retention from a Static Image Left on the Monitor for a Long Period	Faint shadow from the static image appears on the screen.	Use the Power Management feature to turn off the monitor when it is not in use. Alternatively, use a dynamically changing screensaver.
Image Ghosting	Fast-moving images leave a trail of shadow images.	On certain video and applications with fast-moving images, imaging ghosting, which appears as a trailing shadow, may occur. Change the Response Time to Fast in the Display menu.
No Input Signal when user controls are pressed.	No picture, the power LED light is white.	Check the signal source. Ensure that the computer is not in power-saving mode by moving the mouse or pressing any key on the keyboard. Ensure that the video cable is connected properly with the monitor and the computer. Restart the computer.
The picture does not fill the entire screen.	The picture cannot fill the height or width of the screen.	Due to different video formats (aspect ratio) of DVDs and videos, the monitor may display in screen. Run the built-in diagnostics.

Troubleshooting USB Issues
Specific Symptoms	What User Experiences	Possible Solution
USB interface is not working.	USB devices are not working.	Check that your monitor is turned On. Reconnect the upstream cable to your computer. Reconnect the USB devices (downstream connector). Switch Off and then turn On the monitor again. Reboot the computer. Some USB devices like external portable hard drive require higher electric current; connect the device directly to the computer.
SuperSpeed USB 5 Gbps (USB 3.2 Gen1) interface is slow.	SuperSpeed USB 5 Gbps (USB 3.2 Gen1) devices working slowly or not working at all.	Check that your computer is USB 3.2 capable. Some computers have USB 3.2, USB 2.0 and USB 1.1 ports. Ensure that the correct USB port is used. Reconnect the upstream cable to your computer. Reconnect the USB devices (downstream connector). Reboot the computer.
Wireless USB devices stop working when a USB 3.2 device is plugged in.	Wireless USB devices responding slowly or only working as the distance between itself and its receiver decreases.	Increase the distance between the USB 3.0 devices and the wireless USB receiver. Position your wireless USB receiver as close as possible to the wireless USB devices. Use a USB-extender cable to position the wireless USB receiver as far away as possible from the USB 3.0 port.

Documentation

To learn more about how to view or download the User Guides and Manuals for your Dell product. See the Dell knowledge-base article Manuals and Documentation for your Dell Product.

Dell P2423D - User’s Guide
Dell P2423D - Quick Setup Guide
Dell P2423D - Dell Display Manager User’s Guide

Frequently asked questions

How do I set the maximum resolution on Dell P2423D monitor?

Using Windows Display Settings

In Windows 11, Windows 10, Windows 8 or 8.1 and Windows 7:

For Windows 8 and Windows 8.1 only, select the Desktop tile to switch to classic desktop view.
Right-click the desktop and click Screen Resolution.
Click the dropdown list of the Screen Resolution and select 2560 x 1440.
Click OK

Using Nvidia Control Panel

To change the resolution using the Nvidia Control Panel:

Right-click the desktop and click Nvidia Control Panel.
Click the + symbol next to Display on the left pane.
Select Change Resolution under Display.
In the dropdown menu on the right pane, select the resolution 2560 x 1440.
Click Apply.

Using AMD Catalyst Control Center

To change the resolution using the AMD Catalyst Control Center:

Right-click the desktop and click AMD Catalyst Control Center.
Click the + symbol next to Display on the left pane.
Select Change Resolution under Display.
In the dropdown menu on the right pane, select the resolution 2560 x 1440.
Click Apply.

Note: If you do not see the recommended resolution as an option. You may need to update the video card (GPU) driver by visiting the Dell Drivers & Downloads website or the video card (GPU) manufacturers website. To learn how to download and update a device driver, see the Dell knowledge-base article: How do I download and install a device driver?

How do I reset the Dell P2423D monitor to factory defaults?

To reset the Dell P2423D Monitor to factory defaults, see the Reset to Factory Settings section of this article.

How do I run diagnostics on the Dell P2423D monitor?

The Dell P2423D monitor has two built-in diagnostics that are available:

Self-Test Feature Check - The self-test feature check on the Dell P2423D monitor allows you to check whether the monitor is functioning properly.

Built-In Self-Test - The Dell P2423D monitor has a built-in self-test that helps you identify if the screen abnormality is with the monitor or the video card (GPU) on your computer. When you notice screen abnormalities like distortion, clarity, horizontal or vertical lines, color fade. It is always a good practice to isolate the monitor by running the Built-In Diagnostics.

To learn how to run a diagnostic test, see the Running Diagnostics on Dell P2423D Monitor section of this Dell knowledge-base article.

How do I troubleshoot common issues with the Dell P2423D monitor?

The Troubleshooting section of this Dell knowledge-base article provides information about troubleshooting common issues with the Dell P2423D monitor. The section has troubleshooting steps on how to resolve power issues, video issues, color or clarity issues, distortion issues, horizontal or vertical lines, brightness issues or pixel issues and so on.

How do I navigate the On-Screen Display menu?

Use the joystick control on the rear of the monitor to make OSD adjustments.

For more information about using the On-Screen Display (OSD) menu and different menu options. See the Operating Your Monitor section in the User's Guide of your Dell P2423D monitor.

How do I check the model number, firmware version and Service Tag using the On-Screen Display (OSD) menu?

More monitor information like the model number, firmware version and Service Tag can be accessed from the monitor's OSD (On-Screen Display).

Press the joystick on the monitor to enter the On-Screen Display (OSD) Menu.
Press up or down to highlight Other option in the menu and press on the joystick to select.
Press up or down to highlight Model Number or Firmware Version option in the menu and press on the joystick to select.
Press the joystick to exit the OSD menu.

How to troubleshoot no video issue when the monitor is connected using DisplayPort?

Dell P2423D supports both DisplayPort 1.4 connectivity with your personal computer. If the video or graphics card (GPU) on your personal computer supports DisplayPort 1.2, it is required to change the monitor to DisplayPort 1.2 mode.

Note: The default factory setting on the Dell P2423D is DisplayPort 1.4 (DP1.4).

Press the joystick on the monitor to enter the On-Screen Display (OSD) Menu.
Press up or down to highlight Input Source in the menu and press on the joystick to select.
Press up or down to highlight DP in the menu.
Press and hold on the joystick for approximately 10 s until the DisplayPort configuration message appears.

Figure 8: Dell P2423D Joystick Control

How to troubleshoot no video issue when the monitor is connected using HDMI?

Dell P2423D supports both HDMI 2.0 and HDMI 1.4 connectivity with your personal computer. If the video or graphics card (GPU) on your personal computer supports HDMI 1.4, it is required to change the monitor to HDMI 1.4 mode.

Note: The default factory setting on the Dell P2423D is HDMI 2.0.

Press the joystick on the monitor to enter the On-Screen Display (OSD) Menu.
Press up or down to highlight Input Source in the menu and press on the joystick to select.
Press up or down to highlight HDMI in the menu.
Press and hold on the joystick for approximately 10 s until the HDMI configuration message appears.

Figure 9: Dell Joystick Control

What is the supported orientation to set up Dell P2423D monitor?

When setting up your Dell P2423D monitor, ensure that the monitor front panel buttons is on the bottom right.

Using the tilt, swivel, and vertical extension

Note: This is applicable for a monitor with a stand. When any other stand is bought, please see the respective stand setup guide for set-up instructions.

With the stand that is attached to the monitor, you can tilt and swivel the monitor for the most comfortable viewing angle.

Figure 10: Using tilt and swivel extension on Dell P2423D monitor

Note: The stand assembly is not preinstalled when the monitor is shipped from the factory.