Red light in headphone jack and no sound from internal speakers.

Hi Vitmtk, had the same prob right now and then saw your quick trick and it worked!! I guess there were some dust stuck in it. Anyways, thank you so much.

Well i tried everything in this thread and everywhere else i could find. Had the red light. Headphones did not work, blowing didn't work, toothpick, q-tip, pin, one post even suggested wd-40, that didn't work. I even ordered a new audio jack and replaced it and that didn't work. Tried disabling the digital out that someone posted near the end of page 2 and no dice. What finally worked was my old iphone water damage repair trick.

Here are the steps:

1) Remove the mainboard by following this guide: (used this when i replaced the jack)

https://www.ifixit.com/Guide/MacBook+Pro+15-Inch+Retina+Display+Mid+2012+Headpho ne+Jack+Replacement/9732

2) check board for signs of corrosion, mine had some by the speaker connector and where the headphone jack plugged into the main board

3) submerge the board in 99% Isopropanol rubbing alcohol for 15-30 minutes.

4) using a toothbrush and q-tips scrub the area of the main board

5) use a can of air to dry

6) reassemble

Bam! it worked.

Do not do this if you still have warranty, take it to the nice folks at the apple store as i imagine this will void it.

Also if you have a water damaged iphone this will work as well. Just pull out the main board, soak and scrub the crap out of it.

I tried the headphones solution. But I tried it with iPhone headphones. It did not work at first, even after almost 20 - 30 times. It worked only after I tried clicking the headphones volume buttons. Then I removed the headphones, internal speakers worked fine.

worked perfectly!! thank you!

I dont find the \Library\Preferences\Audio\ but i can find \Library\Preferences\ and no audio folder in it. Anyone can help me?

I use Mac OS X Lion 10.7.5

thanks

Vitor

I just had this happen. I took a Q-tip and broke off one end and stuck it in there and gently twirled it inside. The sound came back right away.

Thank you very much!

Hahaha, can't believe the blowing air helped!!! Was thinking its a joke, Thanks!!!

I am 100% confirmed that this problem is hardware problem with head phone jack, if some one want to fix, contact me

Sadly, this seems to be a remittent problem. I tried most of the things in here, including compressed air. I had to lift my macbook pro up into the air, tilt the headphone jack down, and blow into the mic as hard as I could (not with compressed air this time). It works, but when I plug and unplug headphones the red light turns on again. I have a 2011 Macbook Pro.

This worked for me. I blew in the port, wiggled a toothpick around in it, plugged and unplugged the headphones countless times, and all that was useless. But unplugging the headphones while holding down the Volume Down button worked for some crazy reason. So yeah if all else fails, try that.

This saved me a ride to the Apple store too.

The toothpick thing WORKED FOR ME!!! YAY!!! Thanks. 😎

The red light was on, also the sound icon at the top was grayed out. Just kept twirling until the icon showed up black again.

This worked perfect! I just spent almost an hour trying to fix this, tried your suggestion and it was an immediate fix! Thanks!

OMG. Blowing air really fixed the issue. I thought it was a joke. Thank you!!!!!

PS: You really need to put your mouth onto the headphone jack and blow hard to make it work!