Windows 10: Two monitors, both detected but only one displays. Why?

Have just built up a new machine and am having trouble with my monitors. One works fine, but the other just displays a black screen.The monitors and graphics cards have been carried over from my last PC which had no issues, and dual screen works fine when I connect up my work laptop so that rules out an issues with the monitor or cables.Display settings shows both screens so it is being detected, and settings are as recommended and match that of the working screen.I have updated the drivers for the monitors and the graphics card and now I am at a loss of what else to try.Only other informatio

:)

 

Laptop display does not detect itself

Hi,

In regards to your concern, since the second screen can't detect the display settings of your other laptop, we suggest that you perform the steps below and see if it helps:

• Go to Settings.
• Click on System.
• Under System, choose Display.
• Under Multiple displays, click on Duplicate these displays and apply.

Let us know the details so we could further help.

 

Windows 10 is not detecting my second monitor after the upgrade.Monitor display is there on boot up, and is listed in device manager, but is not detected when setting up displays.

Windows 10 is not detecting my second monitor after the upgrade. Radeon 4800 video card. Monitor display is there on boot up, and is listed in device manager, but is not detected when setting up displays.

Changing the title

Old title – Dual monitor issue.

New title – Windows 10 is not detecting my second monitor after the upgrade. Radeon 4800 video card. Monitor display is there on boot up, and is listed in device manager, but is not detected when
setting up displays.

 

display monitor not detected

I have a second screen which was detected and worked yesterday. I was using it as a second monitor by extending my display. From today I am not able to detect it. I am using a HDMI cable to connect my laptop to the second screen.

Steps I have tried:

1. Turning off and then turning on. both the laptop and the power source to the display.

2. Removing HDMI cable and connecting the cable again.

3. Trying to detect the second screen from display settings but i get the error "Didn't detect another display."

4. Disabling and enabling device drivers under "Display Adapters" in device manager.

5. uninstalling and installing driver under "Display Adapters" in device manager.

6. Using win + P and choosing extend display.

7. I also tried using my spare laptop (using ubuntu). And the screen extension worked. So the HDMI cable and the screen display work.

Any ideas on how to proceed with fixing the issue?