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Subject : 
VS138A port 2~8 can't display
 
Description : 
Why monitor can’t display when connect  to VS138A of port 2~8.

 
Solution : 
The VS 138A DDC channel is by pass through port1, if port1 is not connected, some display card does not detect DDC signals, will stop signal output, so, port 1 must be connected monitor.
 
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