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 on, see the expanding section below.
Key features of Dell U3223QE Monitor
The key features of Dell U3223QE monitor are:
- 80.01 cm (31.5 in.) active area display (measured diagonally)
- 3840 x 2160 (16:9) resolution, plus full-screen support for lower resolutions
- Tilt, swivel, pivot, and vertical extension adjustment capabilities.
- Removable stand
- Video Electronics Standards Association (VESA) 100 mm mounting holes for flexible mounting solutions
- Allow user to switch USB KVM function in PBP mode.
- Ultrathin bezel minimizes the bezel gap in multimonitor usage, enabling an easier set-up with an elegant viewing experience.
- Supports Picture By Picture (PBP) and Picture in Picture (PIP) Select mode
- Optimize eye comfort with a flicker-free screen and low blue light feature to minimize hazard blue light emission.
- Ultrathin bezel minimizes bezel gap in multimonitor set-up.
- Single USB-C to supply power to the compatible laptop while receiving a 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.
- HDMI or DP connection supports 10-bit color at 60 Hz. USB Type-C connection supports 8-bit color at 60 Hz.
- Single USB Type-C with Alternate mode DP 1.4, Power Delivery upto 90 W to a compatible computer
- Power and OSD buttons lock.
- Security lock slot
- Upto 0.5 W in the Off Mode
- The Monitor allows multiple monitors that are daisy-chained through DisplayPort to synchronize a predefined group of OSD settings in the background by Multi-Monitor Sync (MMS)
- Premium Panel Exchange for peace of mind
- The Monitor uses a 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 prevents eye strain and fatigue for users.
- The Monitor is designed with Dell Power Button Sync (DPBS) feature to control computer power state from the monitor power button.
Note: Computers that support DPBS are the Dell OptiPlex 7090 and 3090 Ultra platform.
Dell U3223QE Monitor Specifications
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.
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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Setting up your Dell U3223QE 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 only help make the viewing experience the best it 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 have to adjust your chair height or the height of the monitor to achieve this.
Connecting your monitor to the computer
Connect your Dell U3223QE monitor to your computer:
- Turn off your 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 computer.
- Connect the USB upstream cable to the monitor and computer.
Note: Dell U3223QE supports display over USB Type-C port with Alternate mode DP 1.4. Ensure that the USB Type-C on your computersupports Alternate mode DP 1.2 or above.
To learn more about connecting your monitor to the computer, see the Dell knowledge-base article:How to Connect a Monitor to a Dell Computer
Dell U3223QE monitor orientation
Before you rotate the display, extend the display vertically to the top of the stand riser and then tilt the display backward to the maximum to avoid pressing the bottom edge of the display.
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 or cause a safety hazard.
When setting up your Dell U3223QE monitor, ensure that the monitor front panel buttons are 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, 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, swivel, and vertical extension on Dell U3223QE monitor
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: Orientation of Dell U3223QE Monitor
Note: To switch the display setting on your Dell computer between landscape and portrait when rotating the display, download and install the latest graphics driver. To download the driver, go to Dell U2722D Monitor driver and search for the appropriate driver.
Note: When the display is in portrait mode, you may experience performance degradation when using graphic-intensive applications such as 3D gaming.
Configuring the Display Settings on Your Computer after Rotation
After you have rotated the display, complete the procedure that is given below to configure the display settings on your computer.
- Right-click the Desktop and click Properties.
- Select the Settings tab and click Advanced.
- If you have an AMD graphics card, select the Rotation tab and set the preferred rotation.
- If you have an nVidia graphics card, click the nVidia tab, in the left-hand column select NVRotate, and then select the preferred rotation.
- If you have an Intel graphics card, select the Intel graphics tab, click Graphic Properties, select the Rotation tab, and then set the preferred rotation.
Figure 3: Illustration of DP MultiStream Transport (MST) Function
Using the On-Screen Display (OSD) Menu
Use the joystick at the right rear bottom of the monitor to access the On-Screen Display (OSD) menu of the monitor. To access the On-Screen Display (OSD) menu, press the joystick button (Figure 4) at the bottom of the monitor.
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.
Figure 4: Dell U3223QE monitor Joystick control
Function | Description |
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![]() | Press Joystick to open the OSD Menu Launcher. |
![]() | Use arrows for right and left navigation. |
![]() | Use arrows for up and down navigation. |
Reset Dell U3223QE Monitor to Factory Settings
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:
- Press the Joystick at the right rear bottom of the monitor to open the OSD Menu Launcher.
- Move the Joystick Up to open the Main Menu.
- Move the Joystick Left or Right to select Others and then press the Joystick.
- Move the Joystick Left or Right to select Factory Reset and then press the Joystick.
- Press Joystick to confirm the reset action.
Figure 5: Dell U3223QE Front Panel Buttons
Running Diagnostics on Dell U3223QE 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 properly. 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 may be blank and does 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 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:
- 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 U3223QE monitor has an integrated 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).
- Select OSD items of Self-Diagnostics in Others feature.
- Press the Joystick button to start the diagnostics. A gray screen is displayed.
- Carefully inspect the screen for abnormalities.
- Move the Joystick once again until a red screen is displayed.
- Inspect the display for any abnormalities.
- Repeat step 5 and step 6 to inspect the display in green, blue, black, and white.
- The test is complete when the white screen appears.
- To exit, move the Joystick control again.
Note: If you do not detect any screen abnormalities upon using the integrated 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 ishard to see and does 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 U3223QE 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 |
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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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Missing Pixels | LCD screen has spots. |
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Stuck On or Off Pixels | LCD screen has bright spot. |
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Brightness Problems | Picture too dim or too bright |
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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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Screen image is too small. | Image is centered on screen, but does not fill entire viewing area. |
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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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No image when using DP connection to the computer. | Black screen |
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No image when using USB-C connection to computer, laptop, and so on. | Black screen |
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No charging when using USB-C connection to computer, laptop, and so on | No charging |
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Intermittent charging when using USB-C connection to computer, laptop, and so on. | Intermittent charging |
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The LAN port is not functioning. | Operating system setting or cable connection issue |
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Troubleshooting USB Issues | ||
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Specific Symptoms | What User Experiences | Possible Solution |
USB interface is not working. | USB peripheral devices are not working. |
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Super-Speed USB 3.2 Gen2 interface is slow. | Super-Speed USB 3.2 Gen2 peripheral devices working slowly or not working at all. |
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Wireless USB peripheral devices stop working when a USB 3.0 device is plugged in. | Wireless USB peripheral devices responding slowly or only working as the distance between itself and its receiver decreases. |
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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 U3223QE - User’s Guide
- Dell U3223QE - Quick Setup Guide
- Dell U3223QE - Dell Display Manager User’s Guide
How do I set the maximum resolution on Dell U3223QE 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 3840 x 2160.
- 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 3840 x 2160.
- 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 3840 x 2160.
- Click Apply.
Note: If you do not see the recommended resolution as an option.You may have to update the video card (GPU) driver by visiting the 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?