Ok so I have a problem a while back I posted a thread saying how my gpu Radeon 5700 xt doesn’t work in the top slot of my pc the pc just doesn’t show any display on the monitor so I came to the conclusion that the slot was defective and got a new motherboard the rog Z370 f for 8 and 9th gen Intel CPUs my cpu is. I7 8700k I switched out all the parts plugged all cables in booted it up and then it tried to boot twice before staying on problem was that no display in monitor or any other monitor and no lights on keyboard or mouse when I plug out the display from the pc I get hdmi display no signal or display port no signal meaning it was trying to get one I guess and it knew that it was connected to something ? All hardware is on perfect working order apart from the old mobo which isn’t in use is it a software issue a bios issue what do I do ?? Any help would be much appreciated thankyou.