Computer Power Failure

During the last month or so my computer would unexpectedly lose power. The computer would just shut off as if unplugged. I checked all power cords for loose connections, these were fine. The latest software update done on my computer was the iTunes 7.5/QT Player 7.3 update - this was causing my computer to crash when syncing my iPod, so I wonder if this software update was part of the power failure problems. A few days ago, the power failure became unbearable - power would drop repeatedly, many times immediately following startup. After backing up my hard drive, I updating my OS to the 10.4.11 update - manually downloaded from the Apple website, not through Software Update.
Since the 10.4.11 update three days ago I have had no problems with power failure. This morning my computer has last power twice now. What could be potential sources of this problem? Is there a way to fix this?

Hi mrmacdaddy-
It sounds like you may be covered under this: Power Mac G5 Repair Extension Program for Power Supply Issues
Luck-
-DaddyPaycheck

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