The Gamer’s Guide to Troubleshooting Blackout on the Second Screen


As an enthusiast entering the PC gaming realm, I’ve encountered a perplexing issue with my dual-monitor setup. Upon initiating Call of Duty, my auxiliary display turns black. Interacting with it restores the image, yet it refuses to remain visible during gameplay. Could you advise on a configuration that prevents the secondary monitor from losing its display?


Entering the world of PC gaming can be an exhilarating experience, especially when you have a dual-monitor setup that allows for multitasking and immersive gameplay. However, it’s not uncommon to encounter technical hiccups, such as the auxiliary monitor going black when launching graphically demanding games like Call of Duty. This issue can be frustrating, but there are several troubleshooting steps you can take to resolve it.

Understanding the Issue

When you launch a game that changes the screen resolution or switches the display mode to full screen, it may cause the secondary monitor to go black. This is often due to the game commandeering the graphics card’s resources for optimal performance, leaving the secondary display without a signal.

Troubleshooting Steps


Check Display Settings

: Ensure that your display settings are configured to extend the desktop to the second monitor. This can usually be done by right-clicking on the desktop and selecting ‘Display settings’.


Update GPU Drivers

: Outdated or corrupt graphics drivers can lead to various display issues. Visit the website of your GPU manufacturer (NVIDIA, AMD, Intel) to download and install the latest drivers.


Configure Game Settings

: Some games have an option to run in ‘Windowed’ or ‘Borderless Window’ mode. This allows you to switch between monitors without minimizing the game. Check the game’s display settings to adjust this.


Adjust Power Settings

: If your system is set to a power-saving mode, it might turn off the secondary display to conserve energy. Change the power plan to ‘High performance’ to prevent this.


Monitor Source Selection

: Manually select the video source on your monitor. Some monitors do not automatically detect the input source after a resolution change.


Hardware Checks

: Ensure all cables are securely connected and functioning. Try using different ports or cables to rule out hardware issues.


Windows Updates

: Keeping your operating system up-to-date can resolve compatibility issues that may affect your monitors.


A dual-monitor setup should enhance your gaming experience, not hinder it. By following the steps outlined above, you can troubleshoot and prevent your secondary monitor from going black during gameplay. Remember, the key is to ensure that both your hardware and software settings are optimized for a multi-display environment.

I hope this article provides a comprehensive solution to your dual-monitor dilemma. Happy gaming!

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