Apple Cinema Display speakers no longer work after Mavericks update

I have a MacBook Pro 15", purchased in late-2010 connected to a 27" Apple Cinema Display also purchased at the same time. The display connects to the MacBook Pro via USB and mini displayport. The built-in 2.1 speakers on the display were working fine until the upgrade to Mavericks. When I go into the speakers settings, I can change it to internal speakers and the sound comes from the MacBook Pro, but when I choose the cinema display, nothing happens.
Any ideas?
Thanks in advance!

Hi lelandgray,
If you are having audio issues with your Cinema Display after upgrading your MacBook Pro to Mavericks, you may want to make sure that the most recent Cinema Display Firmware Update has been installed. You may find the following article helpful:
LED Cinema Display (27-inch): Intermittent loss of audio
http://support.apple.com/kb/ts3602
Regards,
- Brenden

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