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Paper Tape
Posts: 1
Registered: ‎01-11-2019
Location: GB
Views: 407
Message 1 of 2

T470s Thunderbolt port has stopped working

Hi All


I have been crawling through these forums and Google in general, it seems a lot of people have similar issues.


I run a T470s, I use a Startech USB-C to HDMI adaptor allowing me to connecto to 2 external monitors. I have done for many months and all was fine.


I recently ran system update and found multiple drivers needed updating, I ran this and since I cannot use my external monitors. 


Thunderbolt software is up to date, as per screenshot it doesnt show the controller version or details in lower half. Device Manager doesnt show the controller at all (even hidden devices).


I have tried:

uninstall/reinstall of TB SW

running the firmware update tool but that just says 'No Active Controller' in the system.

I have tried reinstalling every Intel driver available

the BIOS was updated by System Update previously

I have checked the BIOS settings and everything is enabled


I found a system restore point from a few days ago which I think is before this started, rolling back to that allows the TB3 SW to show the controller version and a device showing in Device Manager but my monitors still dont work. A further reboot without changing anything takes me back to 'None' controller version and nothing in Device Manager.


Open to the idea it could be my adaptor has died, I understand you sometimes need a TB3 device connected to update the FW (?) but I do not have any other devices, hoping to try my adaptor on another machine at head office next week to prove it.

Lenovo Employee Rydeen
Lenovo Employee
Posts: 361
Registered: ‎03-03-2017
Location: JP
Views: 336
Message 2 of 2

Re: T470s Thunderbolt port has stopped working

Dear customer,

as long as I understand your situation, Thunderbolt device seems to be broken during previous update process.

I'd like customer to contact Lenovo service to repair the planar.


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