Re: G5 Power supply PA-6601-1 fan problem

Ok.. some good news and some bad news.

I checked all the connectors and got the following

Yellow = 12.2V
Orange = 3.3V
White = 25V
Purple = 5V
Blue = 12V
Red = 5V

So it all looks as if it was working. I reinstalled the power supply and connected everything back up and – hey presto all the fans are back on again..
I guess I must have moved some of the components around on the power board which seems to have fixed the problem.

Thanks...

Re: G5 Power supply PA-6601-1 fan problem

Hi, that was quick.
Thanks, I've cleaned away some of the white glue / paint and I can now see the marking on the board.. I'll start checking the various supplies and post the results.

Re: G5 Power supply PA-6601-1 fan problem

Hi and thanks for the replies. Do you know the pin out for the three connectors coming from the power supply?
There is an 8 pin one, a 24 pin one, but only 22 pins are used and a 16 pin one. Also, do you know which two need to be shorted to switch the power supply on?

As the PC actually works (bar the fans and the supply to the screen) I’m assuming the problem relates to the 12v DC line.

Re: G5 Power supply PA-6601-1 fan problem

Hi and thanks for replying to my post..

I've attached the photo of the power supply...

Hi,
this is my first posting of a problem on this forum and my first experience with an Apple G5. The PC - if I can call it a PC - fires up fine and all is well - but - none of the fans come on, so I am assuming the problem is in the power supply. The display also won't come on, but I suspect again that it also needs 12v DC (the same as the fans) to drive the display. I connected a separate display with it's own power supply which worked fine.

The unit finally shuts down when it gets to hot as the fans are not running. It fires back up again when you have allowed it to cool...