However: I reversed the way the Power Connector is plugged in and it worked immediately, Make sure the small LED is facing towards the monitor.
This hasn't worked for me, even after cleaning all contacts. The thread seems to stop here, but I'm wondering if anyone else has been thusly perplexed still? Display works, USB ports do not. ;(
Nothing but problems with Surface Devices. Second Dock, second Surface Book, fresh installs. Surface Dock Updated app doesn't detect Surface Dock.