USB no longer works

My iPod no longer works when connecting to the computer via USB. I've tried all the 5 steps (except updating or restoring because the updater doesn't recognize it).
I know the battery is dead and when I plug the iPod to the computer via USB I get a weird icon (a large, hollow batter when a black lightening bolt on the left side) in the middle of the display. NOTE: This is NOT the normal charging icon.
If I plug the iPod into the cigarette lighter in my car it charges fine and I can boot up the iPod and play songs on it.
As soon as I plug it into the computer it goes "dead" and I get this weird icon I described.
I've tried this on 4 different computers with 2 different USB cables.
I downloaded the latest updater software and it does not recognize the iPod when I plug it in.
What's the next step to diagnosing this?
Thanks in advance,
Greg in Cary.

b,
We are in business. I charged the iPod via the cigarette lighter (didn't take long). When I plugged it into the computer after charging it I got the familiar ding-dong sound and the iPod updater immediately prompted me to update the software on the iPod (which I did).
After updating, the computer no longer seemed to recognize it. I stopped all the USB devices that were running, one at a time until I finally saw Apple iPod in the list and I stopped that as well and disconnected.
To make a long story short, after rebooting my computer and reconnecting the iPod, iTunes came up as normal and it looks like I'm over this hurdle.
I have no idea why the computer wouldn't recognize the iPod when the battery was dead but suddenly recognizes it after charging it.
My wife says that the iPod had been left plugged into the computer for a long period of time but I'm not sure what that would have done.
At any rate, we're working now and hopefully someone will get some benefit from this thread.
Thanks again,
Greg.

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