X68000 need urgent help

Hi guys i have 2 x x68000 expert systems and i made a pc power supply to power one of my x68000 and it works a treat, but the second one has the original power supply and when i switch the power supply on it boots the machine and after a few seconds turns it self of, off course i have tested the machine with the other power supply and it works ok.

I was wondering what i need to check in order to repair this power supply and try to repair it, i want to use the original power supply as i dont have any more slim power supplys left, ive fixed console but never power supplys so any help wou
d be greatful.


Thanks