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Windows Second Monitor Chose Not to Participate
My second monitor is connected and detected by Windows, but it stubbornly stays black and shows no signal, as if it simply chose not to participate. I have tried different cables, ports, and updated ...
Many monitors (especially Dell) have a built-in self-test (BIST). Unplug the video cable from the monitor while it's on. If a floating box or a message like "No Signal" appears, the monitor is working correctly, and the issue is with the signal source or cable.