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Old 28th November 2010
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jggimi jggimi is offline
More noise than signal
 
Join Date: May 2008
Location: USA
Posts: 7,977
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Lots of possibilities:

Unplugged power cord
Unplugged 2nd USB connector
External device power switched off
Missed message in /var/log/messages
USB disabled in BIOS
Failed electronics in external device
Failed electronics in workstation
Bad connector either end
Bad cable

Choose one or more.
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