2nd Monitor on UD-3900 not working
 

Just purchased three of these things.

The monitors that we are connecting either through hdmi to display port, or vga to display port do not work.

Only the first monitor connecting through vga and dvi adpater works. The second one does not.

Not a driver issue, we have the latest and greatest. Have gone through all the material and beating my head against a wall, considering sending them back.

Am I missing something?

Please help.

The cables you are using to connect to your DisplayPort displays are most likely passive cables that are only meant to work in one direction to convert from a DisplayPort output to a HDMI input. They will not work in the other direction as you appear to be doing.

Depending on the available inputs on your displays there may be other alternatives. More information about cable options for the UD-3900 is here -> http://plugable.com/2015/07/06/video-cables-untangled/

Thanks for response. Guessed that might be the issue, just ordered some vga to hdmi adapters, will connect that to original vga cable, hoping that fixes it.

Will circle back here when parts arrive.

Thanks.