Hi, I've fixed my old 1.6v motherboard for testing purposes. And what do you know. It does boot patched Bios. So, I've swapped HD+ adapter to board that I've fixed and.....same result, blank screen with steady green light.
Well, at least now I have spare working motherboard (that was sitting in the attic, broken for last 10years).
It looks like once AV connector is removed, patched Bios wont work neither with Composite or component cables. For testing I've connected desoldered AV connector with few wires.
M8+_16_Patched.bin