Dell P2423 Monitor Usage and Troubleshooting Guide
Summary: Learn how to use and troubleshoot issues that are related to the Dell P2423 Monitor.
Instructions
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.
The Dell P2423 monitor has an active matrix, Thin-Film Transistor (TFT), Liquid Crystal Display (LCD) and LED backlight. The monitor features include:
- 60.96 cm (24 in.) viewable area (measured diagonally). 1920 x 1200 (16:10) resolution, plus full-screen support for lower resolutions.
- Wide viewing angle to allow viewing from a sitting or standing position.
- Color gamut of 99% sRGB.
- Video connectivity with DVI, DisplayPort, HDMI, and VGA.
- Tilt, swivel, height, and pivot adjustment capabilities.
- Removable stand and Video Electronics Standards Association (VESA) 100 mm mounting holes for flexible mounting solutions.
- Equipped with one USB Type 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 set-up and screen optimization.
- Power and joystick buttons lock.
- Security lock slot.
- Stand lock.
- ≤ 0.3 W in Standby Mode
- Optimize eye comfort with a flicker-free screen and low blue light feature.
- The monitor uses Low Blue Light panel and is in compliance with TUV Rheinland (Hardware Solution) at factory reset/default setting mode (Preset mode: Standard).
This section provides some specifications of the Dell P2423 monitor. To learn more about the specifications of Dell P2423 monitor, see the User's Guide at the Dell Manuals website.
| Screen type |
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|---|---|
| Panel technology |
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| Maximum resolution |
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| Viewing angle |
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| Contrast ratio |
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| Response time |
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| Color gamut |
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| Color depth |
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| Ports and connectors |
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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 P2423 monitor.
To learn how to set up any other stand with a monitor, see the respective stand setup guide for setup instructions.
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 P2423 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.
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 P2423 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 P2423 should not be rotated to 180° (landscape). The monitor supports 90° (portrait) orientation.
When setting up your Dell P2423 monitor, ensure that the monitor front panel buttons is on the bottom right.
Using the Tilt extension
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 Extension on Dell P2423 monitor
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 P2423 monitor
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 P2423 monitor.
Figure 3: Dell P2423 Power Button and Joystick Control
| Button | Function | Description |
|---|---|---|
| Joystick Control | Controls to make adjustments to the On-Screen Display. |
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Resetting a monitor to factory defaults can help resolve many video or display issues. To reset your Dell P2423 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 4: Dell P2423 Joystick Control
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.
Your Dell P2423 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 P2423 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 s. 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.
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.
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.
This section provides information about troubleshooting steps that can help resolve the most common issues with the Dell P2423 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 |
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| No Video - Power LED On | No picture or no brightness. |
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| Poor Focus | Picture is fuzzy, blurry, or ghosting. |
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| Shaky or Jittery Video | Wavy picture or fine movement. |
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| Missing Pixels | LCD screen has spots. |
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| Stuck-On/Off Pixels | LCD screen has bright spot. |
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| Brightness Problems | Picture too dim or too bright. |
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| Geometric Distortion | Screen not centered correctly. |
NOTE: When using DisplayPort input, the positioning adjustments are not available.
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| Horizontal or Vertical Lines | Screen has one or more lines. |
NOTE: When using DisplayPort input, the positioning adjustments are not available.
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| Synchronization Problems | Screen is scrambled or appears torn. |
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| Safety-Related Issues | Visible signs of smoke or sparks. |
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| Intermittent Problems | Monitor malfunctions on and off. |
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| Missing Color | Picture does not have color. |
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| Wrong Color | Picture color is not good. |
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| Image Retention from a Static Image Left on the Monitor for a Long Period | Faint shadow from the static image appears on the screen. |
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| 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. |
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| The picture does not fill the entire screen. | The picture cannot fill the height or width of the screen. |
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| Troubleshooting USB Issues | ||
|---|---|---|
| Specific Symptoms | What User Experiences | Possible Solution |
| USB interface is not working. | USB devices are not working. |
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| 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. |
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| 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. |
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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 P2423 - User’s Guide
- Dell P2423 - Quick Setup Guide
- Dell P2423 - Dell Display Manager User’s Guide
Frequently asked questions
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 1920 x 1200.
- 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 1920 x 1200.
- 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 1920 x 1200.
- Click Apply.
To reset the Dell P2423 Monitor to factory defaults, see the Reset to Factory Settings section of this article.
The Dell P2423 monitor has two built-in diagnostics that are available:
- Self-Test Feature Check - The self-test feature check on the Dell P2423 monitor allows you to check whether the monitor is functioning properly.
- Built-In Self-Test - The Dell P2423 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 P2423 Monitor section of this Dell knowledge-base article.
The Troubleshooting section of this Dell knowledge-base article provides information about troubleshooting common issues with the Dell P2423 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.
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 P2423 monitor.
.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.
Dell P2423 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.
- 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 5: Dell P2423 Joystick Control
Dell P2423 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.
- 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 6: Dell Joystick Control
Dell P2423 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 P2423 should not be rotated to 180° (landscape). The monitor supports 90° (portrait) orientation.
When setting up your Dell P2423 monitor, ensure that the monitor front panel buttons is on the bottom right.
Using the Tilt extension
With the stand that is attached to the monitor, you can tilt and swivel the monitor for the most comfortable viewing angle.
Figure 7: Using Tilt Extension on Dell P2423 monitor
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 8: Using Vertical Extension on Dell P2423 monitor