Computer not found the second screen? This is how to fix it

Today, the second monitor is standard in many PC settings. Whether you are working in the stock market, want to spend a second screen for social feeds or simply need more space for 40 open tabs at once, the second screen is the solution. ("virtual desktop" function on Windows 10 is not enough). So what do you do if the computer can't detect the second monitor? The article will show you how to fix the error of not detecting the second screen on Windows.

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Check the correct port

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Starting with simple things, you should check the loose connections and try different cables to see if the second monitor is connected to the right port. If there is a dedicated graphics card, all image output connections go from there, so monitor cables like VGA, HDMI, DVI, etc. you connect to the motherboard will not work. dynamic.

If you want to use both motherboard and GPU port (because, for example, the graphics card does not have a VGA port and you use a VGA monitor next to HDMI), you can access the computer BIOS and install Set the integrated motherboard as a display display adapter. The driver will take the graphics card in this way, but the motherboard port will work at the same time.

'Forced' Windows must detect the screen

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Most screens will automatically be detected by Windows immediately after connecting them (shortcuts for the Multiple Display option are Win + P , allowing you to switch multiple monitor settings if there are multiple screens connect).

However, this does not always happen, because you are using an old monitor or software (use CCleaner to remove old registry keys, which can cause conflicts in the display driver. ).

For Windows to automatically detect a second screen, right-click on the desktop, click the ' Display settings ' button, then select the ' Detect ' button under ' Multiple displays '.

Reinstall or downgrade the graphics card driver

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If you have problems updating the GPU driver, you should try downgrading the driver to the previous version. The best way to do this is to access Device Manager , find the graphics card under " Display adapters ", right-click it, then click " Properties ". Then click on the " Driver " tab, select " Roll Back Driver " and follow the instructions: Restart your computer and hope your second screen will work again. Re-update to the latest driver version after restarting or for security you can wait until a newer version of the driver is released.

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In the Device Manager window, you can also try the above procedure for the second screen. Find it under the " Monitor " pull-down menu and do the same.

The above methods fix the error of not detecting the second screen. More than ever, check the cables and check the second monitor as a main screen so you know for sure that it is not due to hardware issues.

See more:

1. How to use multiple monitors on one computer
2. How to use Virtual Desktop on Windows 10?
3. How to use 4K TV as a computer screen