SK21H−3 KVM Switch: No Output is Detected

Issue:

No output is detected from the SK21H−3 and the green LED next to the “OK” button flashes.

Solution:

This issue happens when not reading the EDID.
The reading process of the EDID is done when powering the SK21H−3.
Make sure that the display that is connected to the output of the SK21H−3 is powered on before powering the SK21H−3.
Once the green LED lights continuously, the EDID was read correctly.