"no signal input" message on external monitor

I attached a Hannis LCD monitor to my laptop using a standard monitor cable, and all of a sudden I get this message on the monitor "No Signal Input Check Video Cable". There is nothing wrong with the cable, and I tested the monitor with other computers so it is not a PC problem. Why is the monitor not recognizing the input from the device?
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  1. I am having the same issue.

    Regards
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