My Mac G4 quicksilver will not power on. I tried the cmd option P R keystroke, pressing the reset button, leaving the system unplugged for a while, and replacing the clock battery. Power cable and outlet are fine. The next step is to replace the power supply. I want to use a PC ATX power supply that I have on hand, but the power slot is different. The mac motherboard has two extra holes for the main connector. Is there some way I can adapt it?

[jhelm007]

Originally Posted by Juelz

My Mac G4 quicksilver will not power on. I tried the cmd option P R keystroke, pressing the reset button, leaving the system unplugged for a while, and replacing the clock battery. Power cable and outlet are fine. The next step is to replace the power supply. I want to use a PC ATX power supply that I have on hand, but the power slot is different. The mac motherboard has two extra holes for the main connector. Is there some way I can adapt it?

I once saw a how-to posted on www.xlr8yourmac.com for using an ATX PS with a G4, it looked way too dificult to me, but you can check it out. I would recomend getting a QS power supply off ebay.

It must be this... http://www.xlr8yourmac.com/systems/A...X_case_pg3.htm

I am going to give it a try and pray that I don't blow up the motherboard.

[jhelm007]

Originally Posted by Juelz

It must be this... http://www.xlr8yourmac.com/systems/A...X_case_pg3.htm

I am going to give it a try and pray that I don't blow up the motherboard.

That be the one. Good luck. That is an excelent website so I'm pretty sure you can trust the pin-out diagrams (i.e. your MoBo shouldn't blow up;-).

I just noticed the black and yellow wires for the 4 pin connector are reversed . Can't find a proper diagram for this connector. I will just match the colors and hopefully yellow is universally 12V and black is universally Ground.

Hmmm. I also noticed the Mac power supply wires are 18 guage and the ATX wires are 16 (thicker).