Confirmed that your video hardware works with another system?
Off-hand I can't remember - you say it has no daughterboard - I assume you mean the Zorro riser? Can an A4000 boot without the riser? Or is it the A3000 that can't boot with this component missing?
With no devices, you're trying to boot to just see an "Insert Workbench disk" screen, right? You tried leaving it on for a while to account for any drive checks / scanning for devices, yes? (scan may take a while, I believe this was addressed in 3.1)
