Predator Helios 300 PH315-54 no longer sends display via Thunderbolt. Any guidance or suggestions?

zephyrousz

I've been using a USB-C docking station with my Predator Helios 300 (2021) for over a year now. I had two external monitors connected to it and it was running without issues. However, after a Windows 11 update earlier this month (KB5044380), the Thunderbolt connection no longer seems to send out display information. I can still connect external keyboards, mice, microphone, speakers, and video cameras via the docking station, but the monitors aren't even detected. I have tried with another docking station and get the same result.

I can still connect to multiple external monitors using the HDMI and mini-DP outputs, but it is less convenient than routing everything through the docking station. I have tried updating the drivers for my USB controllers and connectors as well as my GPU drivers, but no luck. Has anyone else experienced anything similar? Any guidance or suggestions would be greatly appreciated.

[Edited the thread to add model number to the title]

StevenGen

https://community.acer.com/en/discussion/716420/predator-helios-300-ph315-54-no-longer-sends-display-via-thunderbolt-any-guidance-or-suggestions

Go to Device Manager > System devices and at the bottom of that list uninstall the Thunderbolt Controller and reboot the laptop and see if the TB driver refreshes. If it doesn't work then uninstall the TB driver completely and reinstall the PH315-54 laptops Acer provided TB driver version 1.41.1094.0 again and see if that revives the TB port, otherwise have a look here at the TB solution for Win-11 or if that doesn't solve your TBT4 port solution, then the TB port is faulty and needs replacing. Good luck and hope this helps you out.

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