IIRC, the 3000 power supply was normal (5 and 12 VDC rails) except for an additional 60Hz signal to the motherboard for video purposes? I could be wrong.
Have you searched Aminet and the web for plans to modify a PC power supply?
Pin 3 on the 3000T PSU is -5V. I think that line was removed many years ago on ATX PSU's so a voltage regulator is needed. Or maybe the 3000 machiens work without the -5 volt signal?
