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I updated to 10.4.7 and now my left USB port doesn't work

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Hi all,
I ran Software Update just a second ago, installing an update to MacOS (PowerPC), ITunes, and QuickTime. After the install and the restart, my left USB port is no longer working. It was working immediately before the install.
I have verified that the peripheral that was not working in the left port works just fine in the right one. I have also confirmed that a peripheral that was working previously in the right USB port doesn't work when attached to the left one.
Therefor, I am led to believe that the problem lies in the left USB port. The only thing that has changed is the updater which ran moments ago, and again, the left USB port was working just fine prior to the install.
Has anybody else experienced this problem and knows of a fix/patch/anything I can do?
PowerBook G4 Titanium   Mac OS X (10.4.7)  

Answers

Welcome to the Apple discussions.
I would reset your power management unit, then install the combo 10.4.7 update. Recently, there have been issues with updates through the software update function.
Reset the PMU: http://docs.info.apple.com/article.html?artnum=14449
Download combo 10.4.7: http://www.apple.com/support/downloads/macosxupdate1047comboppc.html

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