There’s no onboard video for this setup* but I’ll try to boot without GPU.
*Only Ryzen CPU with G suffix have integrated graphics. Plus, my CPU is Zen 2 which didn’t have integrated graphics at all.
In short, during POST of the BIOS it attempts an init to the display, fails and then stops attempting the boot sequence. It, the video card, is just as important during init as the motherboard registers, RAM and CPU all starting.
I wasn’t aware of this. I assumed display check would be last considering there can be systems without display.
Let me check if I get NUM LOCK and CAPS LOCK LEDs after removing GPU.