Second monitor not detected, how to fix it

Second monitor not detected, how to fix it

Many users resort to a configuration of two or even three monitors to be able to work more comfortably with their computer. Current operating systems are prepared to work with this type of configuration without us having to do anything, but there are some cases in which the second monitor is not detected correctly. In this article we explain the main tricks you can use to solve second monitor detection problems .

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Are you using the correct port?

The first thing we need to do if our computer is not able to detect the second monitor correctly, is to check that we have connected it correctly to the computer.

Most of today's computers have a graphics card built into the processor, so motherboards come with video outputs included. In case you are using the graphics card integrated into the processor, all monitors must be connected directly to the motherboard.

motherboard video outputs

Common integrated video outputs on one motherboard.

This situation is completely different if you are using a dedicated graphics card on your computer. In this case, the monitors should be connected to the video outputs of the graphics card, and not to those of the motherboard.

graphics card video outputs

Graphics card with 5 video outputs.

Therefore, the first thing you should do if your computer does not detect the second monitor, is to check that you have connected a video output from the motherboard, or from your dedicated graphics card as the case may be.

In the case of dedicated graphics cards, these usually come with three, four and even five video outputs in some cases. We recommend that you consult the manual of your graphics card , to know the correct order, in which you will have to connect the different monitors that you want to use.

Force detection of the second monitor from Windows

All monitors sold today are designed to be automatically detected as soon as they are connected to a computer. However, if you are using a somewhat older monitor, this situation may be somewhat different.

In the case of Windows, the Win + P key combination can be used to access the multi-monitor configuration tool. In this way you can make the image of your desktop be projected on one monitor or both, and in different configurations.

force detection screen 1

If the above doesn't work for you either, you can use a very simple trick that can be used to force stop secondary screens in Windows.

To use this trick, you just have to click with the right button of the mouse on the Windows desktop, when the drop-down menu opens you need to select the option “ Display settings ”.

force detection screen 2

This will open the Windows 10 configuration tool, now you just have to scroll down to the "Multiple screens" section, and click on the " Detect " button .

force detection screen 3

Roll back the graphics card driver

Problems with your computer's secondary monitor may have appeared after you updated your graphics card driver. If this is the case, you can try to fix it by going back to the previous version of the driver, which was working perfectly on your equipment.

This is something that can be done in a very simple way using the Windows 10 Device Manager. You can access this tool in a very simple way, using the search engine that is integrated into the operating system's start menu.

Roll back graphics card driver 1

Once you are inside the Windows 10 Device Manager, you need to look for the " Display adapters " section. Click on it, and a list will be displayed with all the graphics processors that you have installed on your computer.

Usually only a graphics processor or two will appear, depending on whether you are using the card integrated into your computer's processor, or if you also have a dedicated graphics card installed.

In any case, you just have to right-click on the graphic adapter you are using, and then click on “ Properties ”.

Roll back graphics card driver 2

The next step is to enter the "Controller" tab, and click on the " Revert to the previous controller " option .

Roll back graphics card driver 3

Other options you can try are "Update driver" and "Uninstall device." The first one will search for a new version of the driver and install it if available. It is possible that this will solve the problem, if it is due to a bug that is present in the version that you have been using until now.

The option to uninstall the driver will allow Windows 10 to reinstall it on the next computer restart, something that can also solve the problem in some cases if it is due to a bad installation.

Use the latest driver from Intel, Nvidia or AMD

Use the latest driver from Intel, Nvidia or AMD

If so far you have not been able to solve the detection problem with a second monitor on your computer, you should try to fix it by installing the latest version of the driver available on the website of your graphics processor manufacturer .

All manufacturers of graphics cards, both integrated and dedicated, have a support section on their website that you can use to locate the latest version of the driver available.

The Windows 10 Device Manager allows you to know the exact model of your graphics card, so that you will not have problems locating the driver you need to install.

Next, we leave you the access links to the download sections of the websites of the main graphic card manufacturers.

  • Intel Drivers
  • Nvidia drivers
  • AMD drivers

All these drivers are designed to be very easy to install, you just have to follow the steps that your little assistant will indicate.

This is our article on how to solve the main problems related to the detection of the second monitor in Windows, we hope you find it very useful.