> Not sure if this helps, but my sister's machine had a similar problem
> - any time a powered USB hub was plugged in, her machine would refuse
> to boot. Never did figure out why.
a friend found a dodgy powered hub that caused this behaviour with his pc, turned out that the output of the regulator in the hub and the 5V line from the usb port on the PC were simply connected together with no protection against backfeeding.


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