Mac pro usb ports won't work when ipod is plugged in

I just bought a used Mac Pro (2008). 8 cores, 12 meg 0f ram, all of this so I wouldnt be limited as I was with my 4 meg Imac. I go to plug in my ipod, and none of the other ports work, I can't use the mouse or keyboard. Is there any way around this. I had to plug the ipod directly into the tower (the port wouldnt work) This is frustrating, I get this model to be more than capable for what I need, and something like this pops up...always something. If anyone out there has had this experience, and figured out a work around, please help. Thanks

okay, that doesn't sound usual. Sounds to me like the usb port is drawing too much power. Try doing a repair permission or SMC reset. If you are using it with a USB hub, maybe that needs plugging in to the wall, or maybe it has gone bad. I can't help you a lot, but just a little bit. repairing permissions is through Disk Utility. SMC goes like this:  shut down the Mac pro, unplug the power cord,  wait 15-20 seconds. reattach power cord, wait about 15 seconds, then press power button. you can maybe try resetting the PRAM-shut down Mac, turn on computer, hold down Command, Option,P and R keys before grey screen appears. Hold down until computer restarts again and you hear the 2nd startup sound. Let go of the keys.  You can also check in "About this mac" (more info) to see if there's something wrong with the USB ports themselves.
Other than that, could be logic board battery. Maybe Archive and install. Sorry, the crystal ball has gone dark. I"m sure someone else can enlighten you more than I can.  I always plugged my ipod directly into my tower via the front USB port...
John B

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