Raymond Chen recounts a Windows 3.1 support case in which a customer made text, backgrounds and buttons black, leaving an apparently blank screen. He does not know how support actually fixed it; deleting the colors section of WIN.INI from DOS is his speculation. The historical settings documentation confirms that this section defines display colors. Chen also explains that modern Windows long-power-button-hold dumps record whether the screen contains only black pixels, helping distinguish driver or compositor failures from cases in which the component responsible for drawing has stopped.