How to Fix Second Monitor Not Detected

How to Fix Second Monitor Not Detected

/ Shayne Sherman

Having a second monitor opens up opportunity for you to work with multiple applications and play games. Dual monitor setups are commonly used by web developers and programmers. Having a second monitor allows them to work on the website’s code and see the changes in the website on the other monitor.

However, dual monitors can sometimes encounter errors and issues. The most common issue for dual monitors is that the secondary monitor is often not detected by Windows.

To get you back on your work faster, proceed to the guide below to fix the problem on your secondary monitor.

Method 1: Check you Connections

The first thing that you should do if your monitor is not detected by Windows is to check all physical connections.

Step 1: Go to your CPU

Step 2: Unplug all HDMI or VGA cables

Step 3: Turn off your monitor

Step 4: Plug in your monitor’s display cable

Step 5: Restart your Computer Check if the secondary monitor is already working. If not, proceed to the next method.

Method 2: Reinstall your Display Drivers

If you are sure that all of your display cables are connected properly, chances are that the problem is software related.

Step 1: Press on Windows Key + S, and search for Device Manager

Step 2: Open Device Manager

Device Manager

Step 3: On Device Manager, Find Display Adapters and expand it

Step 4: Under Display Adapters, Right click on your video card and select Uninstall Drivers

Uninstall device

Step 5: Restart your computer

Step 6: Go to your video card’s manufacturer website



Step 7: Download and Install the new graphics driver

Step 8: After installation, restart your computer and check if the secondary display is already detected

Method 3: Roll Back Drivers

If you recently installed a Windows update and run into problems with your display. Some users reported that rolling back drivers is another effective way to fix issues with your secondary monitor.

Step 1: Press on Windows Key + S and search for device manager

Step 2: Open Device Manager

Device Manager

Step 3: On Device Manager, Find Display Adapters and expand it

Step 4: Right click on your video card and select properties

Video Card properties

Step 5: On Properties, Go to Drivers tab

Step 6: Click on Roll Back Driver

Roll Back Driver

Step 7: A pop-up window will appear, it will ask why are you rolling back your drivers. Select Previous version of the driver performed better.

Previous version of the driver

Step 8: Click on Yes

Step 9: After rolling back your drivers, restart your computer and see if the problem is fixed.

Method 4: Force Display Detection

Step 1: Press Windows Key and Click on Windows Settings icon

Settings Icon

Step 2: On Windows settings, Click on System


Step 3: On the side menu, Click on Display

Step 4: Scroll down and find Multiple Displays

Step 5: Click on Detect

Detect Multiple displays

Step 6: Once you click detect, Windows will automatically recognize your secondary display

If your secondary display is still unable to be detected by Windows, the problem could be hardware related. Try to use your second display as primary display and see if it will work. If the monitor worked the problem could be with your video card ports or your video cable. In this case, it is better to bring your computer to a service center and let them check your video card and display ports.