No Volume, Volume Icon Grayed Out.. MacBook Pro Late 2008

Hi, I got this problem too. The toothpick thing should do the trick. Try to insert it and gently push forward the hole (it works better if you follow a round path doing this).
Anyway if this doesn't work you have to bring your MBP to an Apple Store or support center.
Let me know, bye!

The switch inside the audio jack is stuck. If using a toothpick did not work, you need to take the computer in for service.

I was able to put a regular headphone back in and then unplug it slowly. This reset the switch and I got my volume back. Best of luck.

Same thing happened to my MBP. Pushing a bobby pin into the headphone jack fixed it. I'd like to know what causes this problem in the first place.
Thx for the help.

Next time you have to do this, don't use anything metal: you could cause a short circuit in the port that might require a costly major repair. A standard headphone plug or a non-conductive material like a wooden toothpick or skewer is safer.

I realize that most bobby pins now are covered with a plastic or resin coating, but it can wear off, and it isn't put there as an electrical insulator.