no dp signal from my devise

Question

no dp signal from laptop to monitor, how can i fix this?

Answer 1

Hi. I'm David, and I'm happy to help you.

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Please share a screenshot of the display adapters in Device Manager.

1. Open "Device Manager" (Windows + X and select Device Manager);
2. Expand "Display adapters" and take the screenshot.

Use the shortcut "Windows + Shift + S" to use the screenshot tool.

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Also, share a screenshot of your system information.

• Press "Windows + R", type msinfo32 and press Enter.

Maximize the window and use the screenshot tool.

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Looking forward to your reply.

Answer 2

Follow these steps in order on the Windows 11 laptop and the monitor:

1. Check basic hardware and monitor input
   1. Make sure the DisplayPort (DP) cable is firmly plugged into both the laptop and the monitor.
   2. Try a different DP cable to rule out a faulty cable.
   3. If the monitor has multiple inputs (HDMI, DP, USB‑C, VGA, etc.), open the monitor’s on‑screen menu and set the input to DisplayPort.
   4. If possible, test the monitor and DP cable with another PC to confirm they work.
2. Try other ports or adapters on the laptop
   1. If the laptop has more than one video output (HDMI, USB‑C/DP, mini‑DP), try another port.
   2. If using a dock or adapter, disconnect it and connect the monitor directly to the laptop to rule out dock/adapter issues.
3. Check Windows display mode
   1. Press Windows logo key + P.
   2. Select Extend (or Duplicate) and see if the monitor starts showing a signal.
4. Update or roll back the display driver
   1. In the taskbar search box, type device manager and open Device Manager.
   2. Expand Display adapters.
   3. Right‑click the display adapter and select Properties → Driver.
   4. If the problem started after a driver update, select Roll Back Driver.
   5. If Roll Back Driver is not available or does not help, reinstall the driver:
      • Right‑click the display adapter → Uninstall device → check Attempt to remove the driver for this device → Uninstall.
      • Restart the PC if prompted.
      • Open Device Manager again, right‑click the display adapter → Update driver → Search automatically for updated driver software and complete the wizard.
5. Check for system/firmware updates (especially on Surface devices)
   • Install all pending Windows Updates.
   • On Surface devices, open the Surface app → Help & support → check and install any driver/firmware updates.

If there is still no DP signal after these steps, test with another monitor or contact the laptop/monitor manufacturer, as the DP port or monitor hardware may be faulty.

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References:

• Troubleshoot external monitor connections in Windows
• Troubleshoot connecting Surface to an external display
• Troubleshooting blank screens in Windows
• Black screen when you plug in a monitor on a computer or open a lid of a laptop that is running in Windows
• My new Surface Laptop won't output properly to my ultrawide screen - Microsoft Q&A
• How to fix compatibily between additional screen, plugged by Type "C" port" after Windows and HP update on Feb, 05th. - Microsoft Q&A
• how to update display drivers - Microsoft Q&A