HT1338 Why is my earphone jack have a red light blinking in it?

I have a MacBook Pro that I bought brand new back in 2009.. There is a red light coming from the inside of my earphone jack and I'm not sure what it means.. my headphones still work and I can hear everything, but I've never seen this red light before. Help?

If you can see the red light with the headphones disconnected, the changeover contact isn't moving back to it's proper position.
You'll find you have no sound from the internal speakers.
Try plugging the headphone jack in and out a few (dozen) times. If that fails you can attempt to tease it back with a non-conducting instrument, like a plastic toothpick or similar.

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Plug and unlpug the headphone jack with some intention to get the mechanical switch to flip.
You can google for more intrusive methods.
ex. Read through all the many approachs: http://www.ifixit.com/Answers/View/8797/Audio+jack+problem,+no+speaker+sound,+re d+light

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Output speakers do not work, have a red light coming out of my headph. jack

My headphone jack works but theres a red light coming out of my headphone jack when its unplugged and my internal speakers will not work...anybody have an idea? Tried system preferences and says no options for selected audio and cant get any sound for my built in output speakers and my volume display in my bar is faded....HELP!

@Spencer
I know this thread was marked answered but thought I should chime in since my MBP (2.66Ghz Late '08, bought May '09) started to exhibit this behavior. I was getting "No Output" greyed out speaker images and the red light coming out from the headphone jack. It's been intermittent but finally wouldn't go away so I figured I'd contact Appe.
This afternoon I called Applecare and was advised to take it to the Apple store... no questions asked, no troubleshooting steps, just told me to take it to the store and even offered to make me an appt. I was able to get an appointment at the genius bar same day (literally 2 hours after I hung up the phone). My wife took a ride with me and we headed down there.
When I showed the technician she tested it and then went to the back room to double check something. When she came back she told me that it was hardware related and needed to be sent in for service. I am under warranty so it was no skin off my back but I will need to be without the machine for a few days.
I agree with Rod to take it in, esp. if you're still under warranty. I should also mention that this only started happening a few weeks ago but the red light part was rather sudden.
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i can hear out of the head phones but the interal speaker will not work

If you're seeing the red light, that means your MacBook thinks there's a digital audio device attached. If replugging and unplugging your headphones don't reconfigure the switch, you can use a toothpick or--carefully--a paperclip to toggle the switch yourself. It's halfway in, on the 3:00 side.

TS1574 you should mention that the audio output jack is fleaky, try plugging and unplugging until red light goes off !!!

It should be mentionned in the Apple help that the audio output jack is sometimes fleaky, as it does not reclose the speakers contacts correctly when an earphone jack is removed. This can be checked by looking into the computer audio jack and seeing a red light, which confirms the optic output is active. Plugging and unplugging the jack until the red light disapears is the cure, unless you are unfortunate enough to have a broken audio jack. Good luck !

Same here. I don't remember doing anything out of the ordinary. I was working in Parallels on getting a AM station to stream via some web interface. Next time I went to play sound on the internal speakers, no go.
I've tried zapping the PRAM, toggling the headphone jack and the toothpick thing. Nothing seems to work.
I've also noticed that I get sound in my headphones in iTunes but not in Garageband (someone had suggested that starting up Garageband would reset things.
Any other ideas out there?
Is there a file that could get corrupted that I could switch out of my back up?

Red light from macbook headphone jack

So, after using external speakers, my sound stopped working...and the audio jack was shining red light. I looked through old threads on this site and saw that there were several different ways to fix the problem (I used a toothpick and it worked..) Only- my volume is now working fine without headphones- but there is still a red light. All the responses I red said that the light would turn off when volume started working....why is my volume working and the light still on?
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meh!
Excuse my lack of tech knowledge- but all I was using the headphone jack for, was for headphones and for connecting my macbook to external speakers. So, I didn't know the port was used for anything....else?
Last thing- I don't remember when I first saw the red light anyway. I was using my computer in the dark and I saw it...and actually thought that (silly me) it was such a convenient thing to have (a shining red light) specifically so we could see where to insert the headphones or whatever if it were dark. (HA!) But then recently my volume has been getting messed up if I leave something in the headphone jack for too long....
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How do you disable "digital optical output" so the red light in headphone jack goes off and I can use the internal speakers?

HI,
I have a red light in my headphone jack and I see "correct responses" listed as "when digital output is enabled speakers are disabled." That's all well and good but doens't really help. HOW do you disable the "digital output," get the red light to turn off and be able to hear through the speakers? What's the SOLUTION to the problem. Sorry, just a bit frustrated. Any help is greatly appreciated.
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Allegedly this can occur if there is a contaminant in the headphone jack that makes the computer believe there is an optical connection there, so it shuts off the internal speakers.
Try inserting and removing a headphone plug repeatedly. This ought to dislodge the junk, and seems to have fixed the problem for others. Hope it helps!

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audio jack was showing red light when i was installing windows first time via boot camp ... !

Try System Preferences>Flash>Advanced tab>Delete All...
My wife's 2011 mbp had the same problem:
no sound from speakers,
sound okay in headphones,
red light on in jack,
slow computer.
She plays MANY different FLASH online games in Firefox. I searched everywhere and found the same advice as you all did ref toothpick in headphone jack, etc. Nothing worked.
Today, I googled "firefox" "problem" and "sound". I found "Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems". I stopped reading at this point and decided to check out the status of her Flash settings. I opened System Preferences > Flash and explored the different tabs and options on my mbp compared to hers and noticed a LOT more "websites" in her Storage and Camera & Mic tabs. I went to her Advanced tab and selected Delete All... . It took over a minute to clear all her "websites". I did a reboot and was shocked, surprised, relieved that her mbp speakers were spewing sounds again! Problem solved! Her computer is now faster as well.
Short story:
System Preferences>Flash>Advanced tab>Delete All...
Hope it works for you, too.

Anyone have no sound without the red light on???

Most of the posts I have read with sound problems seem to be directly linked to the red light on.
I have no red light on and have tried all the solutions on here I can find.
I have no speaker sound or headphone sound. Seems to be locked into the digital out too.
Is anyone else experiencing this problem and had any success with solutions or taken it into Apple.
thanks in advance
A

I don't have any red lights inside my headjack slot. Also, in lifting up the MBP, I realized there were flashing green dots on the bottom.

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Hi and Welcome to the Community!
I used these steps from Geek Squad and it worked for me.
Restore BB10
When a BlackBerry 10 device is only flashing the red light and refusing to boot up, this indicates that the device’s operating system has become corrupted. The flashing light may follow the pattern of 1, 2 or 3 short blips, with a longer pause between the sets.
In order to fix this, you need to re-install the operating system on the device, which will then set the device back to its original factory state.
Please note: this process will completely wipe your device, so please make sure you have a backup of your personal information available to restore before going through this process.
Download and install the latest version of BlackBerry Link for your computer.
Open BlackBerry Link software.
Plug in the BlackBerry device using your USB cable.
At the bottom left of the program, find the device you're having issues with and select it by clicking on it.
The BlackBerry Link application will then ask to either reconnect or reload the device software. Choose Reload.
Confirm the reload when prompted to do so, which will wipe clean any data previously on the handset.
Allow the reload to complete, which can take some time. Whilst this is underway, the device will have a solid green light. This process of downloading and reinstalling the device can take an hour or more, depending on the speed of your internet connection, soplease don't disconnect the BlackBerry until the process has finished.
Once the restore is complete, simply set up your device again, or restore it from a previous backup stored on your machine. However, if you want to restore a previous backup, remember to sign in to your BlackBerry ID on the device first! If you're not sure how to do this, we have a full guide available.
The good news is, this process is almost identical on both PC and Apple Mac. Simply follow the same process as above. Finally, if you have any questions, please don't hesitate to get in touch with us.
VIA | nakumba
http://supportforums.blackberry.com/t5/BlackBerry-Z10/Z10-dead-red-light-blinks/m-p/2478589/highligh...
Please thank those who help you by clicking the button.
If your issue has been solved, please resolve it by marking "Accept as Solution"

Iphone4s my earphone jack does not working correctly , I have to move my plug to get sound

i do have to my my earphone jack in order to have sound

Try Plugging and Unplugging the Jack a few times...
Also Try This...
Close All Open Apps... Perform a Reset... Try again...
Reset ( No Data will be Lost )
Press and hold the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears. Release the Buttons.
http://support.apple.com/kb/ht1430
And... See Acoustic-speaker/microphone/receiver
Here > http://support.apple.com/kb/TS2802
If you try all these steps and you still have issues... Then a Visit to an Apple Store or AASP (Authorized Apple Service Provider) is the Next Step...
Be sure to make an appointment first...

HT1338 Why is my earphone jack have a red light blinking in it?

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