One of my work mates had a ROI that had no working USB or network. He sold.it to me for a small sum.
So when I got home I started to investigate and forms plenty of info on the net about bad joints on the 25Mhz crystal that drives the net/USB chip.
A quick touching with a soldering iron fixed the issue.
I so found that the old "A" series jumper is on the board so that you can just place a pair of solder.shorts and get back to having a single USB port to work with