05-24-2023 08:55 PM
I found out, after a ton of debugging, that the board refuses to POST without a monitor attached. Not without a GPU - I have one in there, a discrete GPU (7900 XTX), but the board simply refuses to POST. Plug in HDMI and it is magically fixed, but this is not a reasonable solution for me.
05-24-2023 09:12 PM
One possibility is that it's really the VBIOS that's getting upset with no output, rather than the motherboard BIOS. If you have another GPU available (ideally something other than a RX 7000 series), you could try swapping it out to see if you get the same behaviour.
05-26-2023 08:26 PM
It occurs with a 6950 XT too, but now I know who to complain to at AMD. Thank you!