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Suddenly all sound devices are gone from the preferences->sounds. No Sound

Suddenly all sound devices from the system are gone. When i check preferences-> sounds, it says "no devices found".
I'm using an External Soundcard, "M-audio Firewire solo". When i removed its connection & restarted, the internal soundcard showed up & ran well. But when i connected it again... "all" devices were gone again... So its a OS/Software issue.
I've uninstalled & re-installed the ext. soundcard's driver, but no change.
Please let me know how to correct/solve this issue.
Thanks

iMac, Mac OS X (10.7.5)

Posted on Feb 22, 2013 1:01 PM

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Suddenly all sound devices are gone from the preferences->sounds. No Sound

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