Dell U3223QE Monitor Usage and Troubleshooting Guide

Summary: Learn how to use and troubleshoot issues that are related to the Dell UltraSharp 32 4K USB-C Hub Monitor - U3223QE.

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Instructions

U3223QE monitor

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Getting Started with your U3223QE Monitor U3223QE 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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The Dell U3223QE monitor has an active matrix, Thin-Film Transistor (TFT), Liquid Crystal Display (LCD), and LED backlight. The monitor features include:

  • 80.01 cm (31.5 in.) active area display (Measured diagonally) 3840 x 2160 (16:9) resolution, plus full-screen support for lower resolutions.
  • Wide viewing angles with 100% sRGB, Rec.709, and 98% DCI-P3 color with an average Delta E < 2.
  • Tilt, swivel, pivot, and vertical extension adjustment capabilities.
  • Removable pedestal stand and Video Electronics Standards Association (VESA) 100 mm mounting holes for flexible mounting solutions.
  • Ultrathin bezel minimizes the bezel gap during multimonitor usage, enabling easier setup with an elegant viewing experience.
  • Extensive digital connectivity with DP helps future-proof your monitor.
  • Single USB-C to supply power to compatible notebook while receiving video signal.
  • USB-C and RJ45 ports enable a single-cable, network-connected experience.
  • Plug-and-play capability if supported by your computer.
  • On-Screen Display (OSD) adjustments for ease of set-up and screen optimization.
  • ≤ 0.3 W in Off Mode.
  • Power and OSD buttons lock.
  • Security lock slot.
  • Supports Picture by Picture (PBP) and Picture in Picture (PIP) Select mode.
  • Allow user to switch USB KVM function in PBP mode.
  • The Monitor is designed with Dell Power Button Sync (DPBS) feature to control personal computer computer power state from monitor power button. *
  • The Monitor allows multiple monitors that are daisy chained over DisplayPort to synchronize a predefined group of OSD settings in the background by Multi-Monitor Sync (MMS).
  • Premium Panel Exchange for peace of mind.
  • Optimize eye comfort with a flicker-free screen and low blue light feature to minimize hazard blue light emission.
  • The Monitor use Low Blue Light panel and compliance with TUV Rheinland (Hardware Solution) at factory reset/default setting model (Preset mode: Standard).
  • Decreases the level of hazard blue light that is emitted from the screen to make viewing more comfortable for your eyes.
  • The Monitor adopts Flicker-Free technology, which clears the eye visible flicker, brings comfort viewing experience and preventing users suffer from eye strain and fatigue.
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.

This section provides some specifications of the Dell U3223QE monitor. To learn more about the specifications of Dell U3223QE monitor, see the User's Guide at the Dell Manuals website.

Table 1: Technical specifications of Dell U3223QE monitor.
Screen type
  • Active matrix - TFT LCD
Panel technology
  • In-Plane Switching Technology
Maximum resolution
  • 3840 x 2160 at 60 Hz
Viewing angle
  • 178° (vertical) typical
  • 178° (horizontal) typical
Contrast ratio
  • 2000 to 1 (typical)
Response time
  • 5 millisecond (Fast mode)
  • 8 milliseconds (Normal Mode)
Color gamut
  • 100% sRGB
  • 100% Rec.709
  • 98% DCI-P3
Color depth
  • 1.07 billion colors
Ports and connectors
  • 1 x DP 1.4 with DSC support (HDCP 2.2)
  • 1 x DP out
  • 1 x HDMI 2.0 (HDCP 2.2)
  • 1 x USB-C (DP1.4 (HDCP 2.2) with DSC support, PD: 90 W, 2/4 Lanes switching) - upstream
  • 1 x USB-C (USB 3.2 Gen2, 10 Gbps KVM) upstream
  • 1 x Analog 2.0 audio line out (3.5 mm jack)
  • 4 x USB-A (USB 3.2 Gen2, 10 Gbps)
  • 1 x RJ45
  • 1 x USB-A (USB 3.2 Gen2 10 Gbps) with BC 1.2
  • 1 x USB-C (USB 3.2 Gen2 10 Gbps, 15 W) downstream

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 U3223QE 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 U3223QE 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 U3223QE monitor to your personal computer:

  1. Turn off your personal computer and disconnect the power cable.
  2. Connect the DisplayPort, HDMI, or USB Type-C cable to the corresponding video or display port on the back of your personal computer. Learn How to Connect a Monitor to a Dell Computer.
  3. Connect the USB upstream cable to the monitor and personal computer.

Dell U3223QE 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 U3223QE should not be rotated either to 180° (landscape) or 90° (portrait).

CAUTION: Dell U3223QE 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 U3223QE 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.

U3223QE monitor Tilt

Figure 1: Using Tilt, Swivel and Vertical Extension on Dell U3223QE monitor

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

U3223QE monitor Rotation

Figure 2: Rotating the Dell U3223QE monitor

NOTE: When the display is in portrait mode, you may experience performance degradation when using graphic-intensive applications such as 3D gaming.

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 U3223QE 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.

U3223QE monitor Joystick

Figure 3: Dell U3223QE Joystick Control

Table 2: Dell U3223QE monitor buttons.
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.

Resetting a monitor to factory defaults can help resolve many video or display issues. To reset your Dell U3223QE monitor to factory default settings, follow these instructions:

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

U3223QE monitor Joystick

Figure 4: Dell U3223QE 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. Learn How to Run a Diagnostic Test 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 U3223QE 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:

  1. Turn off both your computer and the monitor.
  2. 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.
  3. Turn on the monitor.
  4. Turn off your monitor and reconnect the video cable: Then turn on both your computer and the monitor.
  5. 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 U3223QE 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.

  1. Ensure that the screen is clean (no dust particles on the surface of the screen).
  2. Unplug the video cables from the back of the computer or the monitor. The monitor will now enter self-test mode.
  3. On the front panel, press and hold Button 2 on the front panel for 5 s. A gray screen appears.
  4. Carefully inspect the screen for abnormalities.
  5. Press Button 2 on the front panel again. The color of the screen changes to red.
  6. Inspect the display for any abnormalities.
  7. Repeat step 5 and step 6 to inspect the display in green, blue, black, white, and text screens.
  8. The test is complete when the white screen appears.
  9. 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.

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 our Dell Display Pixel Guidelines.

This section provides information about troubleshooting steps that can help resolve the most common issues with the Dell U3223QE monitor. Alternatively, learn How to Troubleshoot Display or Video Issues on a Dell Monitor or go to our monitor self-help guide.

Table 3: Troubleshooting common display issues on Dell U3223QE monitor.
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.
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 Display Pixel Guidelines for more details.
  • Run the built-in diagnostics.
Brightness Problems Picture too dim or too bright.
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.
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.
Screen image is too small. Image is centered on screen, but does not fill entire viewing area.
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.
Table 4: Troubleshooting USB issues on Dell U3223QE monitor.
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.
Super speed USB 3.2 Gen2 interface is slow. Super speed USB 3.2 Gen2 devices working slowly or not working at all
  • Check that your computer is USB 3.0 capable.
  • Some computers have USB 3.0, 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 3.0 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.

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

Additional Information

Frequently asked questions

Using Windows Display Settings

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

  1. For Windows 8 and Windows 8.1 only, select the Desktop tile to switch to classic desktop view.
  2. Right-click the desktop and click Screen Resolution.
  3. Click the dropdown list of the Screen Resolution and select 3840 x 2160.
  4. Click OK

Using Nvidia Control Panel

To change the resolution using the Nvidia Control Panel:

  1. Right-click the desktop and click Nvidia Control Panel.
  2. Click the + symbol next to Display on the left pane.
  3. Select Change Resolution under Display.
  4. In the dropdown menu on the right pane, select the resolution 3840 x 2160.
  5. Click Apply.

Using AMD Catalyst Control Center

To change the resolution using the AMD Catalyst Control Center:

  1. Right-click the desktop and click AMD Catalyst Control Center.
  2. Click the + symbol next to Display on the left pane.
  3. Select Change Resolution under Display.
  4. In the dropdown menu on the right pane, select the resolution 3840 x 2160.
  5. 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. Learn How to Download and Install Dell Drivers.

To reset the Dell U3223QE Monitor to factory defaults, see the Reset to Factory Settings section of this article.

The Dell U3223QE monitor has two built-in diagnostics that are available:

  • Self-Test Feature Check - The self-test feature check on the Dell U3223QE monitor allows you to check whether the monitor is functioning properly.
  • Built-In Self-Test - The Dell U3223QE 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 U3223QE 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 U3223QE 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 U3223QE monitor.

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

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

Dell U3223QE supports DisplayPort 1.4 connectivity with your personal computer.

NOTE: The default factory setting on the Dell U3223QE is DisplayPort 1.4 (DP1.4).
  1. Press the joystick on the monitor to enter the On-Screen Display (OSD) Menu.
  2. Press up or down to highlight Input Source in the menu and press on the joystick to select.
  3. Press up or down to highlight DP in the menu.

U3223QE monitor Joystick

Figure 5: Dell U3223QE Joystick Controls

Dell U3223QE 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 U3223QE is HDMI 2.0.
  1. Press the joystick on the monitor to enter the On-Screen Display (OSD) Menu.
  2. Press up or down to highlight Input Source in the menu and press on the joystick to select.
  3. Press up or down to highlight HDMI in the menu.
  4. Press and hold on the joystick for approximately 10 s until the HDMI configuration message appears.

U3223QE monitor Joystick

Figure 6: Dell U3223QE Joystick Control

USB Type-C port on your Dell U3223QE supports USB Power Delivery, Data, and DisplayPort video signal. The USB Type-C port can be used for video and data signal, and supply power (90 W) to a compatible laptop personal computer using a single USB Type-C cable that is provided with the monitor.

NOTE: Dell U3223QE can supply power over the USB Type-C cable only to a compatible laptop personal computer that supports Power Delivery (PD) over USB Type-C. Not all laptop PCs with USB Type-C support Power Delivery, for more information see the User Manual or contact your laptop manufacturer.
NOTE: USB Type-C power delivery-compliant port (PD version 2.0) delivers up to 90 W of power. If your laptop personal computer requires more than 90 W to operate and the battery is drained. It is recommended you use the standard AC adapter of the laptop personal computer to turn on and charge the laptop battery.

If you are using a Dell laptop personal computer that supports charging over USB Type-C. It is recommended to update the BIOS and Video or Graphics card (GPU) driver. Learn How to Download and Install Dell Drivers.

Dell U3223QE 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 U3223QE should not be rotated either to 180° (landscape) or 90° (portrait).

CAUTION: Dell U3223QE 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 U3223QE 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.

U3223QE monitor Tilt

Figure 7: Using Tilt, Swivel and Vertical Extension on Dell U3223QE monitor

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

U3223QE monitor Rotation

Figure 8: Rotating the Dell U3223QE monitor

NOTE: When the display is in portrait mode, you may experience performance degradation when using graphic-intensive applications such as 3D gaming.

Affected Products

Dell U3223QE
Article Properties
Article Number: 000201085
Article Type: How To
Last Modified: 16 July 2025
Version:  7
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