I have the same problem
I have the same problem. Dell XPS 15 9570 Win 10PRO 64-bit NVIDIA GeForce GTX 1050Ti with 4GB GDDR5
On USB 2 port, displays "NO USB CONNECTION" a few times and goes dark. On USB 3 port, constantly disconnects/reconnects, and DUEX never displays anything. On Lightning port, initially shows desktop wall paper but goes blank - at least here it does not blank the main laptop display too.
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