I can't really even check the capacitor's in the PSU, as I am inexperianced enough with mains voltage circuits. If you can help me there, please feel free to do so. Maybe once I've finished my own PSU project I'll be more confident.

Speaking of other PSUs, is there any way that I can try my computer with a different supply (I don't know about the power connector pin mapping either). If that works, I might want to try recapping my PSU, otherwise I won't bother with that.

P.S. Old macs is not my hobby-I was just given an unloved mac.