MBPro 17 Intel Core 2 Duo Audio only works with the headphones?

Question

MBPro 17 Intel Core 2 Duo Audio only works with the headphones?
There is a red light constantly emitting from the headphone socket?
I can not listen to sound unless headphones are plugged in - when taken out I get a red light and the volume controls kets seem locked?
Please help!
Julian

Answer 1

Hi Kitty.
Seems to be quite a popular problem. In another post, I posted the following.
"The red light is the data signal that is transmitted if you plug in an Optical Audio device such as surround sound speakers. I had the same problem for a short while with my 17' MBP. Sound was working fine from my built in speakers but I plugged in some earphones to listen to something that I did not want the rest of the office to hear and after pulling the hearphones out, the optical signal (red light) was being transmitted. The switch Cessna is referring to is the switch that is triggered inside the port that tells OSX that earphones/optical audio device is plugged in and to shut down power to the built in speakers. When the device is un-plugged from that port, the switch should get triggered again and power up the built in speakers and disable the optical light signal. Perhaps there is the slightest defect on the earphones you are plugging in that are preventing it from triggering the switch when the earphones are un-plugged.
Try a different sent of earphones to maybe trigger the switch if you are uncomfortable with the paper clip solution."
That seemed to solve the problem for that user.
The link to the post is http://discussions.apple.com/thread.jspa?threadID=895286&tstart=30
Good luck