So this is my problem:

I do not have any red light coming out of my headphone input. However, when I unplug my headphones, I get the "no sound" symbol when I try to change the volume and no sound comes out from my speakers.

When I do plug in my headphones, sound only comes out of one headphone speaker. I know it's not an issue with my headphones because they work fine with my iPod.

Does anyone know what might be wrong? I really don't want to go to the Apple store and have them tell me I have to pay tons of money. Thanks!

PS: I don't know if this helps, but there was a piece of a headphone jack stuck in the input a few weeks ago. I got it out, but I don't know if that issue is causing recurring problems.