No old Amiga PSU here, ATX 600W. I've tried another PSU still samething, not sure about getting it to boot.
With the kickstart screen showing corrupted. Might plug in a gotek.
Did you manage to try a different pair of rom chips yet?
I have a FastATA MkIII with Apollo1260. I remember when I was first building this system, it wouldn't boot with KS3.0 roms, just a black screen. And I can't remember whether it was the FastATA or just the fact that the FastATA was combined with the Apollo, but anyway - 3.1 roms worked and 3.0 roms didn't (black screen). Just something to consider if you decide to test with 3.0 roms. It may have even been with the Apollo1240 not the 1260, I can't remember exactly...
