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Fanfold Paper
Posts: 4
Registered: ‎06-26-2014
Location: US
Views: 335
Message 1 of 2

x270 with USB-C (40A9) Dock monitors

I support an x270 running Windows 10 that is docked to a 40A9 USB-C dock. It's been working fine but now the two monitors attached to the dock are blank. If I pull the USB-C cord out of the x270 and plug it into my x1Yoga the monitors light up normally so it seems the dock, cables and monitors are fine. When the dock is plugged into the x270, the x270 'thinks' the monitors are working fine. In fact, the monitors blink briefly when the dock is patched in. I went into display settings (laptop open as a third monitor) and even made one of the external displays the primary monitor and it took it (that was a trick to get out of that). As you move the mouse around it's apparent it is going out onto the external blank monitors.



I installed tp_usbc_dock.exe, loaded the latest Intel HD Graphics 620 drivers (the x1Yoga is running dated 6/30/2017 which I can't seem to find). I looked for a restore point but there was none.


Does anyone have any suggestions?

Thanks, R-

Lenovo Employee Jan_Lenovo
Lenovo Employee
Posts: 51
Registered: ‎12-17-2017
Location: CN
Views: 280
Message 2 of 2

Re: x270 with USB-C (40A9) Dock monitors

hi Ne57301,

could you have a try latest graphic driver  ( released recently and dock FW as well? thank you




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