If the alternate device displays an image, the original computer may be the source of the problem. Look for bent pins, frayed wires, or corrosion, which can interrupt the signal and cause intermittent or complete display failure.
Monitor Black Screen No Power Light: Quick Fixes and Diagnostic Steps
A monitor black screen can halt your entire workflow, but resolving the issue is often more straightforward than you might think. Ensure the monitor is plugged into a working power outlet and the power cable is securely connected at both ends.
When testing, try using a different video port on the monitor. Ensure the card is properly powered by auxiliary cables from the power supply, as an underpowered GPU often leads to a complete lack of output.
Monitor Black Screen No Power Light: Diagnosis and Fixes
Use the monitor's physical buttons to cycle through the input options until you see a signal. Next, verify that the monitor is set to the correct input source for your device.
More About How to fix monitor black screen
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