I had already installed windows 10 and both monitors were working, but I had many issues with windows 10, so I went back to windows 8.1. Unfortunately, windows 8.1 kept trying to install windows 10 as part of the update process. I could not stop it, so I finally had to let it re-install windows 10. From the beginning of the above process to now, my accessory monitor screen is blank black.
I look at trouble shooting and tried to uninstall Display Link and reinstall, but ‘the system’ would not let me uninstall the old program or reinstall the new one.
The accessory monitor works fine when bypassing the Plugable dock and plugged directly into my computer. I already have to plug my external speakers directly into the computer due to very inferior sound quality running through the Plugable. Avoiding having to unplug and re-plug everything whenever I use my laptop away from the office is the reason I got the dock in the first place.