I just bought a new ASUS ROG Strix Z390 - E Gaming motherboard but I'm not getting a display. Everything is powered, the lights are working, the cpu fan is spinning, but no display onto my monitor. I've spent hours trying to figure it out, but I'm stuck.
did you try the 2nd pcie port? Also do the upper right corner LEDs show anything? Like white (=no grafic card ?), Did you try to connect the monitor to the Motherboard, so you can see if gf shows up in the Bios.