Sometimes Windows may not recognize the second monitor you are trying to set up due to driver or hardware issues. There are several methods you can try to find and fix this problem.
Before trying the software solutions, make sure you cover all the hardware checks well.
Hardware-Checks
Before changing the system settings, follow these hardware troubleshooting steps to resolve your issue:
1. Make sure your external display is connected to a power source and turned on . You can look for the small power indicator on the lower part of the screen if it has one.
2. Try restarting your computer to establish the connection.
3. Make sure the correct input is checked (refer to the device manual if necessary).
4. Make sure the cable is properly connected between your computer and your external display.
5. Disconnect the signal cable connection from both ends and wait one minute before reconnecting.
6. Try using a different cable to ensure that the problem is not with the cable.
7. Displayport and HDMI cables may come in different versions. Be sure to use the correct cable .
8. Try using different ports to ensure that the problem is not with the ports.
9. Connect the external display to another computer to rule out that the external display is defective.
10. Obtain a working monitor and connect it to your computer to ensure your graphics card is healthy.
11. If you have other peripherals attached to your system, such as printers, cameras, USB drives, etc., unplug them all to ensure they are not causing conflicts.
If all hardware checks have been performed and your problem is still not resolved, please try the methods below one by one.
Method 1: Force secondary display via Settings app
1. Open the Windows Settings app by pressing the WIN+I keys at the same time. Click the System tab .
2. Now click the Display option in the left pane and click the Detect button in the right pane . This will force Windows to recognize any additional monitors attached to your system.
Method 2: Connect external wireless display
1. Press the WIN+I keys at the same time and open the Windows app Settings . Click the Devices tab .
2. Click Bluetooth & other devices option in the left pane and click Add Bluetooth or other device in the right pane .
3. When the Add a device window opens, click the Wireless display or docking station option
4. Consult your wireless display's manual to turn it on and make it discoverable to other devices.
5. Once the device is discoverable, select it from the list of available devices and follow the on-screen instructions.
Method 3: Update the display adapter from Device Manager
Outdated graphics card drivers can always cause problems with the displays. Please follow the steps below to update your graphics card adapter successfully.
1. Press the WIN+R keys at the same time and call the Run window . Type devmgmt.msc and press Enter .
2. Expand the Display adapters section and right-click your display adapter entry. Next, click on the Update driver option .
3. In the next window that opens, click Search automatically for updated driver software option .
Please wait while the driver is updated to the latest available version. Then check if your problem is resolved.
Method 4: Rollback the display adapter via Device Manager
If the previous method didn't find any new updates, your problem could be due to an unstable graphics card version installed on your computer. Rolling back this update could very well fix your problem.
1. Open the Run dialog box by pressing the WIN+R keys at the same time . Once opened , type devmgmt.msc and press Enter .
2. As with the previous method, expand the Display adapters section and right-click on your display driver. Now click on the Properties option .
3. Click the Driver tab and then click the Rollback Driver button . If rollbacks are not possible, you cannot click this button.
Follow the on-screen instructions to successfully roll back your display driver to a previous version. Check if your issue is resolved once the process is complete.
Method 5: Reinstall your graphics card driver
If the above two methods didn't work for you, you can try uninstalling and reinstalling your graphics card driver.
1. Simultaneously press the WIN+R keys . When the Run window opens, type devmgmt.msc and press Enter .
2. Expand the Graphics Cards section , and then right-click your graphics card driver. Now click on the Uninstall device option .
After the uninstallation is complete , restart your computer . When the computer restarts, Windows will automatically install any missing drivers. Check if your problem is solved or not.
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