If you have these symptoms, we recommend a very gentle and minute tinkle of WD-40 into the audio output jack, followed by gently inserting and removing the audio input jack a few times. * only 'Digital audio out' as the only output source displayed in the Sound pane of the System Preferences. * the red light that continues to emanate from the audio output port * a 'no parking' like symbol appearing below the sound icon whenever you attempt to manipulate the volume on your Mac * the internal speakers still chime when your Mac is powered on Macriot has the solution: macriot - Apple Hardware | The Fix For No Sound From Your MacBook Pro or iPhoneįor MacBook Pro owners this is commonly characterised by: I ran this test a few days after I didn't have sound anymore, I was about to call service when I found out about this this test in the manual.

Restarted the MBP again and now it does recognize the headphones again, and everything seems to be back to normal. Then plugged in my headphones and to my surprise wasn't recognized. iTunes also worked again, internal speakers. I restarted the computer and I noticed the sound icon in the right top corner was back again. What did work for me was to run Apple Hardware Test (restart while keepin 'D' on the keyboard pressed. The exact same images as the topicstarter posted aplied to my MBP. It was just a little bump on the side where you can insert DVD's and it could've been I already didn't have sound before that but didn't notice because I mute my sound often. My MBP had a little drop of the couch wich might've triggered the condition, although I'm not sure. Only I didn't have the start-up sound when I rebooted, so no sound at all. Macbook Pro (15' model with trackpad, and 4GB RAM). I had the exact same thing as the topic starter.

No internal audio macbook pro