How to test a G5 power supply

[DeltaMac]

Sure! There's good information about pinouts in Apple's PowerMac G5 service manual - if you can find one. Maybe someone who has access to one can help with that info.

If you have several identical power supplies, you can certainly compare one to another. Voltages missing on one should lead you to believe that a power supply may be bad.

[mosesk]

I'll try to locate one.
Thanks

[mosesk]

i got a hold of the Apple Service manuals for Power Mac G5s and unfortunately there is not any more information other than checking for the 5V trickle charge

[DeltaMac]

Look again, there's charts (several of those) in that section of the service manual that show you the pinouts for the power supply connectors, and the voltages that should be there (usually to ground, or the common connection.
Some of those voltages may not be available unless the power supply is under load (connected to the logic board, and powered on)
In the 'other' PC service world, there's standard power supply testers that you can purchase, but the connectors on the G5 power supply do not fall under that same standard, AFAIK, so you're pretty much on your own.

If this is beyond your experience, then you would need to take your power supplies to someone who can help you.

[maxxypane]

You have to find Apple Service Center, or someone can test for you. FWIW Apple Service Source manual has detailed instructions for testing, but do not even think about it, if you do not know what precautions to take.

[fazlurrehman]

Ok Thanks I will do this.