Vista - Speakers stop working

I recently bought a s video cable to connect my laptop to my tv and before, and during the first time I connected them, the speakers worked fine. Shortly after I unplugged them, I noticed the speakers were not working. I plugged in headphones and they had full sound but when I took them out, the speakers still refused to play. I checked the sound setup to make sure it was still set to the proper output and everything should be working but isnt. The cable doesnt deal with sound so Im not sure if it could even be the problem, but they were working fine until it was used. Any ideas? I have a hp dv2600 special edition notebook