Had a working setup, now I don't. Only 2 of my 3 displays show up. Windows does not detect the 3rd. Tried different monitors and cables, no luck. I was running Win 10 1803, but after it stopped working I upgraded to 1809 as an attempted fix. After that didn't work, I ran DDU (display driver uninstaller) and uninstalled the AMD graphics driver completely, and installed the latest one from AMD's website. Nada.
I'm assuming a Windows update cause the issue, but I cannot confirm. This happened a little while ago and I don't remember exactly when.
Core i3 2130
Asus motherboard (I don't know exactly what model, PC is located at a remote location)
Asus RX 550