It seems like it is fairly common for users to install the display adapter but then get no display or functionality on their screen. There are quite a few things that can cause this and the user manuals can bet a little bit vague as far as troubleshooting. There are a few main reasons this occurs. The most common is that you need to update the display adapter driver. It could also be due to screen settings or resolution settings. It is also possible that your primary graphics car will need to be updated. Sometimes your computer just needs a reboot.
All of these cases are common with the video out functions of the docking station products as well so the same fixes are applicable. Installing an outdated display adapter driver is by far the most common reason that users are not getting a display out of their adapter. The website www.j5create.com always has the latest driver versions available and tells you the version number on the support page.