My 4k HDMI port has quit working

Im running a HP Spectre x360. It’s always worked fine. I restarted my system and it all of the sudden the 4k hdmi out quit working. I’ve verified that the monitor is working and switched out cables. I ran the Display Link cleaner tool, and made sure all my drivers and current versions of the pluggable software was up to date and reinstalled. I have the Plugable usb-c 4k dock. The two Display ports are working correctly, it is just the HDMI 4k port that has quit working.

Hello James,

Thank you for contacting Plugable support! Sorry to hear about this issue. I’d be more than happy to assist you.

If you haven’t already done so, fully unplug the dock from all devices, power, and USB-C cable to the host computer. Wait about 30-60 seconds, then reconnect the power cable first, USB-C host cable next, and USB devices last. Sometimes a reset in this order can resolve this issue.

Unfortunately the DisplayLink drivers don’t affect the 4K HDMI output, it uses USB-C VESA DisplayPort Alternate Mode video output which means that port is driven directly from the video card in your Spectre.

If the reset doesn’t help, we have a troubleshooting tool that helps us find out what is going on in situations like this. Please plug the dock into your computer, then go to this page and follow the instructions there:

http://plugable.com/support/plugdebug

Please don’t hesitate to let us know of other questions.

Thanks again for contacting Plugable support and best wishes!

Joshua Henry

Senior Engineer
Plugable Technologies


http://plugable.com | http://performance.plugable.com/

1 Like

Hi Joshua,
I don’t mean to thread hijack but I’m having an almost identical experience as the original poster except that my laptop is HP Zbook Studio x360. I follow the reset steps you left but still no display on the HDMI port on the USB-C 4K device (both display port are working fine). I ran the debug tool you linked to and will send it to the email address give if someone there can take a look and let me know how to fix this issue.

Thanks - Dan

No problem @mrpunch000

It looks like you’ve indeed emailed us about this issue if I’m not mistaken, we’ll get a reply to you there ASAP!