Beginner at this, so forgive me and please be patient
😛I had a fair few issues on first assembly, but it restarted itself a fair few times, and I used the Cmos clear on the back and I got to this screen:

So I pressed F1, and that screen goes but that's it, I see nothing else. Fans are running, and it 'looks on'. Q-Code is A9.
I'm connected via the boards HDMI port, seems it doesn't like it. <-
The other topic clued me inInput a 7850 GPU I have, connected via DVI and shows Bios Screen OK.
So yeah this topic is solved, found the 'fix', the default/initial Bios of the Maximus VIII Gene Z170 board won't output via HDMI.