My new HP EliteDisplay S140u is not working properly on my HP ZBook 17G2. I checked the drivers and the latest ones are installed. When the ZBook is docked into my docking station the EliteDisplay is working correct. When I take the ZBook out of the docking it works. However, when I connect my ZBook to the adapter without being connected to the docking station the EliteDisplay does not work. It is active but it does not give any image. The USB is plugged into bothe USB ports. Please help!