LG Monitor not detected

Hi, for a long time my TB4 usb C hub has worked amazingly. I work on a surface pro 8 and have to plug in a monitor with a displayport to usb c. Recently my monitor stopped being detected when it was plugged into the TB 4 dock but works perfectly when connected directly with my laptop. This defeats the purpose of having the dock and keeps me from plugging anything else into my surface I just installed the latest bios update from microsoft but unfortunately it didn’t seem to fix the problem.

I have unplugged the monitor and when I plug it back in I hear the surface acknowledge that something has happened but the display doesn’t come on and eventually goes back to sleep.

Hi Pamela,

Thank you for posting! I am sorry things are not working as expected while using your Plugable TBT4-HUB3C Thunderbolt 4 hub and I would be happy to help.

Thank you as well for the detail you have provided and for the troubleshooting that you have already performed that is all much appreciated.

Based on your description of the behavior, our next step is to get some additional information.

Can you please send an email to our direct support email address → support@plugable.com with ‘For ticket #- 390929’ in the subject line that contains the following information?:

  1. The Amazon Order ID number for your TBT4-HUB3C purchase (this is available from https://amazon.com/orders )

  2. While the TBT4-HUB3C is connected to your Surface Pro 8 and the LG display is connected to the TBT4-HUB3C via the USB Type-C to DisplayPort video cable (*** even if not working as expected, this is important ***), the output of our diagnostic utility PlugDebug → https://plugable.com/pages/plugdebug

This information will help us to determine the next steps.

*** Please do not post the above information here in our public forum, as it contains personally identifiable information ***

Apologies for the frustration, and thank you for giving us the chance to help!

Plugable Technologies

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