We are having problems with our Surface Pro 7s and an older model dock. Not the model 1664 your mention, but the 1661 made for the surface pro 3/4/book. Everything works except for external displays. We have 2 surface pro 7s and three of the 1661 docks and the displays will not work. Audio, USB, charging all work fine. Windows can even see that there are two additional screens connected, it just won't make them active in the display settings.
The frustrating thing about this it we received our surface pro 7s a few weeks ago and the external displays were working fine. There was a windows update that installed to both of the surfaces a few days ago and since then the displays will not work anymore.
I know it's not the docks because they still work fine with our older surface books.
I've been running circles with MS support - they just want me to reinstall drivers and/or reinstall Windows.
I really don't want to buy two new docks.
02-07-2020 01:45 PM