external monitor no longer detected after windows update 4K USB 3.0 -> DisplayPort

Last week I bought a USB 3.0 4KDP to DisplayPort adapter and new external monitor. Setup was super easy and everything was working well.

Last night I received a notice that some important updates to Windows were ready. After installing those updates and rebooting my laptop, my external monitor shows up with “No DisplayPort Signal” and in Windows Ctrl Panel -> Display, the external monitor is gone and it only detects the laptop screen.

The adapter’s blue light turns on when booting up, but then quickly turns back off.

I tried uninstalling and reinstalling the DisplayLink software 7.8 and tried 7.9 as well.

Any help would be appreciated.

Windows 8.1
USB 3.0 to Display Port 4K
DisplayLink 7.8 software
Asus PB278q Monitor

Hi RS,

Thanks for posting! As you have already reached out to us directly at support@plugable.com, we’ll want to keep working with you directly. My reply should come through shortly. For the benefit of anyone following this thread, the first step would be to perform a clean installation of the DisplayLink driver:

  1. Disconnect the adapter from your system, and please keep it disconnected until prompter.
  2. Download, extract and run the DisplayLink cleaner software --> http://www.displaylink.com/downloads/… to remove the current driver from the system (video walk-through -> https://youtu.be/AcVV1gD_FvI)
  3. Reboot, even if not prompted.
  4. Install the DisplayLink drivers from this link --> http://www.displaylink.com/downloads/…. Reconnect the adapter when prompted during the installation.
  5. Reboot after the installation completes, and if all goes well, things should be working as expected once you’re back in Windows.

If that helps, great! If not, we’ll want the output of our diagnostic utility PlugDebug --> http://plugable.com/support/plugdebug as this will allow us to examine some log files from your system to help determine the next steps. As we don’t want that information posted publicly please send the result to my direct email I mentioned earlier.

Thank you,

Plugable Technologies