No audio except when booting up

MacBook Pro 15" mid-2010
2.66 G Intel Core i7
4 G 1067 MHz DDR3
OS X 10.8.5
My audio is gone, except for the sound when booting up. The speaker icon is grayed out. When I go to System Preferences->Sound->Output, the internal speakers are not there. The only things showing are an optical digital-out port and my AirPort extension.
The only thing I did differently between when the audio worked and when it did not was run this DVD: http://www.amazon.com/VideoLab-4-0-Herbert-Zettl/dp/1111348901/ . When the audio worked earlier today, I was using headphones.
I've tried:
rebooting
shutting down and restarting
putting the headphone jack in and pulling it out several times
restarting holding down command-option-p-r
restarting holding down ctrl-option-shift on the left and pushing the power button
I downloaded 10.8.5 from the internet so do not have an install disk to reinstall the operating system. After reading the reviews, I'm afraid to update to 10.9.1.
Does anyone have any ideas, other than heading to the genius bar?

First check System Preferences/Sound - check all the settings to make sure mute is not selected.
Repair permissions & restart.
Troubleshooting issues with no audio from built-in speakers on Macs
Open up GarageBand if installed then, open a program (optional).
Quit out of the GarageBand app.

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