Worryingly I couldn't get the machine to boot afterwards. I got a completely blank screen and no hard drive activity. After pressing the power button about 4 times and praying it booted fine.
Syslog shows the following using mint 13
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hub 2-0:1.0: connect-debounce failed, port 3 disabled
Mar 15 18:33:51 nrh1-Satellite-L350 kernel: [ 338.532066] hub 2-0:1.0: connect-debounce failed, port 1 disabled
Mar 15 18:33:53 nrh1-Satellite-L350 kernel: [ 340.460050] hub 2-0:1.0: connect-debounce failed, port 2 disabled
Self sorted now working again after another cold reboot.