It's difficult to see what AROS is doing without some serial debug. It may have booted "correctly" but the display driver isn't working... and all the display is left unseen.
I have this DELL laptop which our NVidia driver is unable to fetch the correct display port (EDID etc...) it boots, but the display doesn't work. External monitor works though and it works pretty fast.
We have ancient Gallium driver that when updated would make this all go away.
We have no code to use USB debug (One port should always be able to directly communicate with other PC via "no-no usb cable" usb-a to usb-a)
If you have a docking station that has serial port then you could see what AROS is doing in the background.https://www.amazon.com/StarTech-com-Beige-USB-2-0-Cable/dp/B0002MKBI2EDID: Oh, no ei sulla ollutkaan läppäriä, mutta sama homma. Ehkä näyttöajuri ei vain toimi... (Oh, well, you didn't have a laptop, but the same thing. Maybe the display driver doesn't just work ..)
EDID: It seems you have a serial port on your "not a laptop machine" Through that we could get some more information
EDID: It seems that your boot has halted before any display driver... There should be more debugs showing. NULL pointer isn't either a joy to see.
How is your BIOS setup?