same problem on several TC. WYSE 5070 "B72GXN2". No signal on both DP connections. Screen is a Dell P2314Hc.
same thing here with Wyse Management Suite 1.3 on thin clients 3040 and 5070.
just presenting citrix storefront applications onto the desktop. A user will open an app, do what they need to do, and "sometimes' the screen will go black and stay that way. I can see the mouse pointer, it moves around fine, but the screen remains black.
Only fix i've found so far is to restart the thin client.
These units are less than a week old.