Misconfigured settings in your display control panel can make your computer screen go black and white when HDMI is plugged in. Reset these settings and see if the screen turns back to normal.

Use the following solutions to fix the Black and White squares issue on your Windows 11/10 computer screen. First, you need to apply some basic fixes and see if these can resolve the issue.

When a personal computer starts, it runs a Power-On Self Test (POST) to check that various hardware components are working correctly. If problems are detected, the computer will not start.

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