Sometimes, Windows 10 cannot detect the second monitor due to hardware or driver problems. And if a similar situation occurs, then there are a number of steps to quickly fix the problem with connecting a second monitor.
Checking the hardware
If Windows 10 cannot find the second monitor, then first follow these steps:
- Reboot your computer.
- Make sure the correct input is selected.
- Check the cable connection between the monitor and the video card.
- Disconnect the cable at both ends, wait a few seconds, and then reconnect it.
- Use a different cable as the problem may be with the connector pins or a damaged cable.
- If your monitor and video card have multiple ports, try switching ports.
- Connect the monitor to another computer to determine if the problem is not with the monitor.
- Connect another working monitor that is known to be in good working order to test the performance of the video card.
Configure 2nd monitor in system parameters
If you are sure that there are no hardware problems, the physical connection is correct, all elements of the connection circuit are in good order and their functionality is fully checked. Now let's check the settings in the Settings app.
Force detection of a second display
To do this, go to "Start" - "Settings" - "System". In the left side panel of the system window page that opens, go to the "Display" section.
Now in the right sidebar "Change screen layout" click on "Detect".
After that, the monitor should be detected, and then it can be configured.
Connecting a wireless display
Open "Start" - "Options" - "Devices". Then, on the left panel, click on the "Bluetooth and other devices" section. Then on the right side, click on the "Add Bluetooth or other device" button.
Next, in the new "Add device" window, select the "Wireless display or docking station" section.
Make sure the wireless display is turned on and discoverable. Select the required monitor from the list. Continue following the onscreen instructions and the second display will appear in the list as the second.
Update your graphics card drivers to the latest version
Damaged, faulty or outdated video card drivers are normal for the computer, so they have to be reinstalled or updated periodically.
You can update them manually or through the Device Manager, you can also perform a forced update.
1 way. To update them manually, go to the video card manufacturer's website, enter the exact model of your video card in the search bar (you can see it using the CPU-Z program, for example). Go to the product support page and download the latest driver for your OS. Next, install the driver and restart the PC.
Method 2. Open "Start" - "Windows Administration Tools" - "Computer Management".
On the left side of the "Computer Management" window, click on the "Device Manager" section, and on the right side, click on the RMB on the "Video adapters" label.
Select "Update driver" from the drop-down list.
Next, select "Automatic search for updated drivers".
We are waiting for the process to complete and restart the PC.
Method 3. To re-install the video card driver forcibly, you need to remove it from the device manager. Press "Search" - enter "Device Manager" - click on the RMB icon - "Run as administrator". Right-click on the "Video adapters" entry, select "Remove device" from the menu.
We confirm the deletion and restart the PC, after which the OS will re-detect the device and install the driver.
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