No sound from internal or external speakers

Imac 27" mid-2011 running Maverics 10.9.3  I'm not getting any sound from internal or ext. speakers.  I can hear the startup sound when booting up.
System Preferences->Sound only shows Digital Out for OUTPUT and Output Volume is maxed and can't be adjusted.  Mute is NOT checked.
I've done an SMC and PRAM reset with no change.  I've tried multiple times plugging and unplugging the external speaker cable jack.
Any suggestions would be most welcome.

Hey krawfo,
Thanks for using Apple Support Communities.
Looks like you are not getting sound from your speakers. I see you have tried different things to try and resolve this. This article is a good resource for this issue.
Troubleshooting issues with no audio from built-in speakers on Macs
http://support.apple.com/kb/ts1574
Check to see if a red light is lit in the line-out port. If so, your Apple computer may need service.
Have a nice day,
Mario

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