I just purchased a U2719DC monitor and it won’t work via USB-C to my Dell Precision 5510. The U2719DC says no signal from device but the U2719DC works from my MacBook with no problem via USB-C and the same cable. The U2719DC also works via HDMI. I have checked a firmware update on Dell site and it is a newer version on the monitor than what is online. The updated Nvidia Quadro driver and that did not help. I spent 4+ hours today on the phone with a tech-support supervisor and they could not help. 
Thanks in advance.