Why does my monitor keep showing no signal even though the DisplayPort cable is connected properly, and what should I do?

Please check the following:


  1. Update Graphics Card Driver and Motherboard BIOS: Ensure that you have the latest graphics card driver and motherboard BIOS version installed. These updates can sometimes fix compatibility issues and improve overall performance.
  2. Switch to HDMI: If you're unable to update the driver while connected via DisplayPort due to "no signal," try connecting the monitor using HDMI instead. This will help determine if the issue is specific to the DisplayPort connection.
  3. Check Input Menu: Verify whether the input menu on the monitor allows you to select the DisplayPort option. If it's not selectable, double-check that the DisplayPort cable is properly connected to both your monitor and the graphics card.
  4. Reconnect the DisplayPort Cable: Unplug the DisplayPort cable from both ends and then plug it back in. This action will prompt the monitor to re-detect the connection, potentially resolving any connection issues.
  5. Test with HDMI: If possible, connect the monitor using an HDMI cable to ensure that the monitor is functioning correctly. Once confirmed, switch back to the DisplayPort connection and see if the "no signal" issue persists.
  6. Cross-Test with Multiple Devices: Try connecting the monitor to multiple devices that support DisplayPort to see if the problem is specific to one device or the monitor itself. Additionally, try using different DisplayPort cables to eliminate the possibility of a faulty cable.
  7. Check DisplayPort Settings: If the issue occurs suddenly after using DisplayPort normally, ensure that the DisplayPort is set to a resolution and refresh rate supported by the monitor.
  8. Contact Customer Service: If none of the above steps resolve the problem, it's possible that there's an issue with the monitor itself. In this case, you should contact the customer service team of the monitor's manufacturer for further assistance.


By following these steps, you should be able to diagnose and address the "no signal" issue with your monitor effectively.


ESD input menu

Applicable Models

XL2411P (24"), XL2411K (24"), XL2430 (24"), XL2536 (24.5"), XL2540 (24.5"), XL2540K (24.5"), XL2546 (24.5"), XL2546K (24.5"), XL2546S (24.5"), XL2720 (27"), XL2731 (27"), XL2740 (27"), XL2746S (27"), XL2731K (27"), XL2746K (27"), XL2566K (24.5")

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