I am trying to connect two external monitors to my Latitude 5490. Both monitors work when connected to the HDMI port directly. But I can't get any display signal out of the USB-C port. I have tried two different WD19S docks and neither will show a signal to a monitor connected to the dock by HDMI or Display Port cable. The dock will power the laptop and the mouse and keyboard work through the dock, but no video. I have tried connecting a monitor to the USB-C port with a USB-C to DisplayPort cable and that also does nothing. The monitors are Dell P2422H and P2417H. It seems like that functionality is disabled or something. Any thoughts? Thanks.