This message indicates that your display is powered on and functioning, but it is not detecting a video feed from the computer. The graphics processing unit is the component responsible for sending the image to the screen, so it requires thorough investigation.
Reset Monitor Settings to Resolve No Signal Issue
A disconnected or damaged cable is the prime suspect in the majority of cases. It is a communication error rather than a definitive hardware failure, and the root cause can range from a loose cable to a faulty graphics card.
If this works, the original screen or its settings are the problem. Connect your computer to a different monitor.
Reset Monitor Settings to Resolve No Signal Issue
Reseating the Graphics Card For desktop users, turning off the power and removing the graphics card can resolve connectivity issues. When to Seek Professional Help.
More About My monitor says no signal
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