No Sound on my first generation MacBook Pro

I was watching a web video and noticed there was no sound. I figured the volume was down so I pressed the volume button. I could hear the clicks and see the volume level on the screen go up but I still had no sound. I tried iTunes and still no sound. I restarted and while it was restarting there was a progress bar like when firmware is updated but I don't recall downloading or installing anything. I don't know what that was. Now I don't even have the volume clicks.
At first I thought it was the issue that sometimes happens when you plug headphones in and the optical switch stays on with the red light in the headphone jack. That's not the problem because the light is not on and I can see the volume being adjusted but there is no sound. I've noticed when the optical switch is on with no headphones you can't change the volume. I played a video in Quicktime and there are no levels in the audio meter.
I've searched the forums but can't find anyone with a similar issue. I need this laptop to last at least a few more months and I definitely need the sound working tomorrow for a shoot. Any suggestions?

Disconnect all peripherals from your computer. Boot from your install disc & run _*Repair Disk*_ from the utility menu. To use the Install Mac OS X disc, insert the disc, and restart your computer while holding down the C key as it starts up.
Select your language.
Once on the desktop, select Utility in the menu bar.
Select *Disk Utility.*
Select the disk or volume in the list of disks and volumes, and then click *First Aid.*
Click _*Repair Disk.*_
Restart your computer when done.
Repair permissions after you reach the desktop-http://docs.info.apple.com/article.html?artnum=25751
http://docs.info.apple.com/article.html?artnum=300832
Open up GarageBand if installed. Open a program (optional).
Quit out of the GarageBand app.

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