How to test a DisplayLink monitor

Your DisplayLink monitor may be blank, show the wrong size, or look different from a screen connected directly to your computer. Because DisplayLink sends video through a USB-connected adapter or dock and its software, the cause could be the display, the connection, or the driver.

Use the Screens tool to check what your browser can see and run a color test on the display. Then use the Display Test if you want to inspect pixels, colors, or refresh behavior.

Test the DisplayLink screen

1. Open Screens and find the display connected through DisplayLink. Check the resolution and scale reported for it.
2. Open your computer's display settings and confirm the monitor is active. If the screens are duplicated, switch temporarily to an extended desktop so you can tell which physical screen you are testing.
3. Move the browser window onto the DisplayLink monitor. In Screens, run the color test on that screen and look for uneven areas, lines, flicker, or pixels that stay a different color.
4. For a closer visual check, open Display Test on the DisplayLink monitor. Look at its solid color patterns and refresh test, and compare what you see with the same test on another screen if available.
5. If the image is wrong or the monitor does not appear, reconnect the dock and display, then repeat the check. Change only one connection at a time so you can see what affects the result.

Keep the monitor's own menu closed during the test, and use its normal brightness setting. Extreme brightness or a picture mode can make a good panel look uneven.

What the result means

The screen appears with its expected resolution and scale

The operating system and browser can identify the monitor as a screen. This is a useful sign that the DisplayLink connection is active, but it does not prove the cable or driver is working perfectly in every application. Check the color patterns and your usual apps too.

The screen is missing or has an unexpected size

The operating system may not have activated the display, or the DisplayLink adapter, driver, dock, or cable may not be passing the display information correctly. Check the system display settings first. A missing screen in a browser test alone does not identify which component is at fault.

Color patterns look clean, but video or scrolling stutters

The panel may be fine, while the DisplayLink software, USB connection, or graphics workload is causing the slowdown. A browser color test is not a test of sustained video performance. Compare the same content with the monitor connected directly to the computer if you can.

A line, color patch, or pixel defect stays in the same place

If it remains in the same physical spot across different colors and inputs, the panel may have a defect. If it moves when you change the cable, dock port, or computer, suspect the signal path instead. Use a full-screen test on the monitor itself or a direct connection to help separate the two.

How to fix a DisplayLink display problem

1. Confirm the monitor is active. On Windows 11, open Settings › System › Display and check that the DisplayLink screen is present and enabled. On macOS, open System Settings › Displays. Choose an extended desktop while testing if duplicate screens make it unclear which display is active.
2. Check the monitor's input. Use its physical menu to select the input connected to the dock. Make sure the monitor is powered on and not set to a different HDMI or DisplayPort input.
3. Reconnect the USB and display cables. Unplug and reconnect the dock, then reseat the video cable at both ends. If possible, try a different compatible cable or dock port. Avoid changing several connections at once.
4. Check the resolution and scale. In Windows 11, use Settings › System › Display and select the DisplayLink screen to review its resolution and scale. On macOS, use System Settings › Displays to review the available resolution choices. Select a resolution supported by the monitor.
5. Restart or update DisplayLink software. Close and reopen the DisplayLink app or manager if your setup uses one. Install the current driver or software recommended by the dock or adapter maker, then restart the computer. An outdated driver can make the screen disappear or behave inconsistently.
6. Check macOS permissions if prompted. DisplayLink software may need screen recording permission to create the display output. Review System Settings › Privacy & Security and allow the DisplayLink app if macOS asks for it. Follow the prompt shown by your version of macOS.
7. Bypass the dock for comparison. If your computer and monitor support a direct video connection, connect them without DisplayLink. If the same defect remains, the monitor or its cable is more likely at fault. If it disappears, focus on the dock, USB connection, or DisplayLink software.

What the browser test cannot prove

Screens reports display information available to the browser and can show a color test on a chosen screen. It cannot confirm that DisplayLink's driver is current, test every part of the USB link, or certify the monitor's full image quality. A browser may also report a scale that differs from the monitor's physical resolution. Use the operating system's display settings to check the resolution actually selected.

If the display works directly but repeatedly fails through the dock after a software update and a known-good cable test, contact the dock maker or the computer's support team with the model names and the steps you tried.