I'm a long-time lurker here, but I've finally registered to get some tech support. The internal speakers on my Macbook have stopped working. Headphones work fine, but when I unplug my headphones, I don't get any sound from the internal speakers. After a restart, the computer gave the startup noise, so I know they work. The sound option in my system preferences doesn't have internal speakers listed, only 'line out'. As another interesting point, the headphone jack has this strange red light coming out of it that I never noticed before. The speakers were working fine last night, but I plugged in my headphones today and now they won't work. Any suggestions? Thanks for the help.