Same here.
I put the bios in the bios folder and even in the rom folder to test. I tried adjusting some of the diff system settings and it flashes black and pauses like its trying to load up but doesnt.
Tried rom in CHD and ISO format. No go.
I thoughts its possible its a hardware issue as on my Lenovo the yabasanshiro core for Saturn never worked either
Ive seen a ytber comment on that too,for certain PC’s/hardware maybe.Not sure.
So for Saturn I gotta use Beetle.Kronos runs slow but Beetle works just fine unfortunately it doesnt have upscale option though.