Hi!
I just registered to say that i'm having the same problem. Im running on ryzen 7 1700x / ASUS ROG Strix X370-F motherboard / 16gb 3200 gskill / evga ftw gtx 1080 / windows 10 up-to-date.
I installed iCUE yesterday and all of the sudden, random black screen/no more video output, it also turns off my Corsair Strafe RGB when that happen and thats the only reason why I have installed iCUE.
* Note, my mouse (Zowie) doesnt turn off when that happen *
I just uninstalled iCUE and no more black screen so far.
Also note that im running EVGA Precision X and Thermaltake TT RGB Plus.
It might be a compatibility issue with TT RGB Plus.. i doubt it would be EVGA Precision X.. but I dont know.
I guess I just won't install iCUE :/