Try a different monitor. Connect your computer to another monitor or screen to see if the black and white issue is because of the operating system or the actual physical screen.

If your Windows computer screen goes black & white when HDMI is plugged in, reinstall the display driver, perform calibration, reset control panel settings, etc.

If you see Black and White squares on your computer screen, the problem may be with your display, GPU driver, or GPU. Use these fixes to resolve the issue.