Chosen Solution

PowerMac G5 DUal 2.0 Ghz PCI-X Serial No. : CK411J3JQVJ This PowerMac works perfectly… until it powers itself off. I expect it needs a new PSU? but which one ?

Disable Energy Saver computer sleep & put hard drive to sleep settings. Remember to return and mark accepted the answer that best solves your problem. Good luck, N