I just got a UD-3900. I plugged it into power. I installed Display link drivers on my laptop (HP EliteBook 840 G5). I rebooted.
When I plug the ud 3900 into any of my 2 USB ports… nothing. No alert that a device was plugged into Windows. Mouse doesnt work. External monitor doesnt wake up.
All these devices work fine when plugged in directly to my laptop.
While powered the ud 3900 has a blue led that flashes intermittently.
What am I doing wrong?