Red Light, No Audio, Realtek

The Problem
When I run Windows Vista a red light appears in my audio port and the sound, no surprisingly, doesn't work.
The Computer
Macbook Pro running the latest MAC OS and Windows Vista Ultimate.
What I did
- I installed Windows using Boot Camp 2.0 (which is the latest I believe)
- I downloaded the latest RealTek drivers. But here is the thing, after I loaded the new drivers, they don't seem to take. In my devise manager the driver is called "High Definition Audio". However, on a Macbook I have which has Windows Vista running properly, the devise manager says "Realtek High Definition Audio" and even has it's own control panel. To my thinking when I load the latest drivers from RealTek it should load "Realtek High Definition Audio", but it doesn't. When I manually try loading the drivers it says I have the latest update.
But still the red light and no audio.
Any help? Thanks.
Otto

thanks. I downloaded Boot Camp 2.1 but it wont install. I double click it and the ALLOW/CANCEL screen comes up, but nothing happens after I ALLOW it. Could it be that this is for XP only and not Vista?

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Boot Camp Windows 7 do not recognise wifi, ethernet, USB ports and has a scary red light in audio jack output!

Hi!
I have just tried to install Windows 7 x86 version on my MacBook Pro running Mountain Lion and a couple of strange things start appearing:
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I appreciate all help!

Did you make sure to install the Bootcamp utilities after installing Windows? They can be found in the boot disk/usb flash that Bootcamp creates (check for a folder called "Windows Support").These should enable sound/video/trackpad/etc.to work with full functionaliity under Windows (you may need to reboot after doing so). After installing them, you may also want to run Windows Update to make sure you get the latest drivers.
As far as the red light, many models of Macbook Pros are equipped with a digital Audio out. You can either use the standard analog 3.5mm Stereo jack (standard headphone connector), a 3.5mm miniSPDIF digital coax or miniTOSLINK digital optical cable (hence the red light). Windows may not know how to handle to audio out port until the proper drivers are installed and it may be enabling the digital signal by default. Installing the drivers mentioned above should set this back to normal operation.
hope this helps.
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Kernel Panic plus a Red Light from Audio jack

First off, I'm gettin a Kernel panic EVERY SINGLE time I boot into Macintosh. This is not good. I can't access my Mac partition at all, and now I'm stuck with using Windows.
Secondly, there's this red light that's coming out of my Audio jack. I've done some research and I've already inserted a toothpick and tried to toggle a 'switch' or something, but the red light hasn't gone away. I'm still without any sound.
Any help would be greatly appreciated!

1.
Alright, here's a snapshot of the Kernel Panic message:
http://i.imgur.com/d8jqMYu.jpg?1
2.
And man, I've already tried inserting my headphone jack in and out rapidly, but the red light is still there. Is there any other way?

Red Light in Audio Jack

I tried to turn up the volume for my internal speakers but it says it can't do it & a red light shines out from the audio jack. If I put external speakers in the audio jack, they will work just fine. Why won't my laptop speakers work?

Some device you plugged into the headphone jack was slightly out-of-spec dimensionally and jammed the jack in the "mute" position. Most people are able to "unstick" the connector by inserting a headphone plug and wiggling gently in the horizontal plane.
Apparently there is a dimensional standard for 1/8" stereo mini-pin plugs that is observed by some manufacturers better than others others. I have a dirt-cheap set of external speakers whose plug fits the jack on my MBP perfectly. Yet I also have a "name-brand" set of headphones whose plug is a little too long and can cause the problem you have if I run the plug in "to the hilt." When i use the headphones, I'm careful to insert them only until I get satisfactory stereo sound. The plug is secure at that point but the stop shoulder on the plug is not touching the side of the MBP at the port.

No internal speakers | digital output only | red light from audio jack

I plugged in a stereo through analogue mini jack to the headphone socket of my mac book pro. When i unplugged the stereo, the internal speakers failed to work. There is now a red light coming from the jack as if a "digital output" is plugged into the socket. But no digital output has ever been plugged into the socket - and I have no control of mute or volume settings.
When I plug headphones in, they work fine and I have control of mute and volume settings. Once the headphones are removed I am automatically set back to "digital output" with no control over mute or volume, and no audio from m internal speakers.
I have tried changing the settings in system preferences/sound/settings/output ... but there is no option other than "digital output". I suppose I would like to select "internal speakers" but there is no option for this. And like I stated earlier, the jack is lit up red.
I've tried software updates, restarts, disk utilities (permissions and repairs including repairing with the startup disk), plugging and unplugging, but to no avail.
When I try to change the volume on the keyboard's volume controls I get the "no entry" sign under the volume bar and have no control (as if it were stuck on mute).
The only thing I can think of is that I forced a mini jack into the headphone socket too hard so I'm worried that I've damaged the hardware.
Could this have caused the problem? Or is this a software issue? Any help would be appreciated.
In short I have no sound from the internal speakers.

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?

No audio with 64 bit Vista Ultimate, red light in headphone jack

So I've been searching these forums for the last several hours, trying to find some helpful tidbit of knowledge to help me in this situation. I have whatever the latest version of bootcamp installed, and just did a full install of Windows Vista Ultimate (64 bit). With relative ease, I got everything working except for sound. With the generic driver off the Snow Leopard install disk, it tries to tell me it's working, but there is obviously no sound. The red light inside the headphone jack stays on all the time, and I have tried all the dumb tricks suggested for that issue too. I have unsuccessfully manually installed the latest realtek driver (2.28), and even tried both the 32 bit and the 64 bit. The 32 obviously does nothing, but with the 64 it tells me the device won't start, and shows that obnoxious yellow exclaimation point. Just trying to progress beyond this point so I can hear what I am trying to do in windows. Please help!

Same problem here. Daily I plug in speakers at the office, then rely on internal speakers while on the road/at home. I use old analogue speakers that go into the headphone jack.
I don't think i have any firewire audio out devices, but think i might put my hands on a USB one, so will try a varient of that trick.
tried the "wiggle the plug" solutions, but no luck.
I have to say, after something like 20+ years of using apple products (IIC was my first), my instinct here is that this is a software issue. People are getting sound out of a variety of devices (USB, Firewire, headphone plug) and the problem is intermittant but recurring. I don't wonder if it didn't start w/ the last iTunes update (to 4.9)? just a guess there. (although note that when i was fiddling w/ iTunes, the system speed and iTunes slowed way down.
Apple, please note there are two other related threads on this, one small at
Topic: "Sound optical out/ Headphone"
and a very large one (which may conflate several problems) at
Topic: "Entire sound on PB is gone ! "

HT1567 I can't import an audio cd to itunes to add to my library. I ran a diagnostics test and it had a red light next to: Unable to access audio cd. I am wondering if anyone else has had this problem and if there is an easy solution?

I can't import an audio cd to itunes to add to my library. I ran a diagnostics test and it had a red light next to: Unable to access audio cd. I am wondering if anyone else has had this problem and if there is an easy solution?

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From your statements above, it sounds like you never tried to burn a CD for at least the first year that you owned the laptop, as it had a one year warranty on it. While you might have used it frequently to install software, play DVDs, Blu-Ray disks, etc, that's unclear from your statements. Nonetheless, it might just be dirty-dusty. So, before deleting-uninstalling any software, and given they're cheap, try a CD-DVD Cleaner Disk first and see if that resolves your problems.
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Macbook 2008 no audio from speakers - can't disable digital audio - red light in headphone jack

Looking for help with this problem, that seems like a lot of people had in the past and still have, but I see that a couple of discussions on it here have been archived. Too bad, as the problem continues.
I seem to be having the same problem with my late 2008 white 2.1Ghz Macbook.
I had used earphones a few times with movies and iTunes, with no problems. Now I've just rebooted to find that I have no audio from internal speakers (the boot up chime works though). Earphones work perfectly.
There is a constant red light in the earphone jack. The volume icon in the top menu bar is greyed out. In the Sound preference panel, Built-in Speakers are not available as an option for audio out. The only option is Digital Audio. If I connect earphones, then they are available as the only option.
I have tried all the various methods that people have recommended, to switch off digital audio through the earphone jack: trying to flip the little switch with a toothpick, paper clip, etc., as well as cleaning around inside the jack with a bit of rubbing or cleaning alcohol; also tried inserting and removing the earphones plug several times, while pushing the volume buttons on the keyboard. Nothing works.
I did get something from inserting/removing the earphone plug, as I seemed to be able to adjust volume from the keyboard, but I never got sound out from the speakers; the volume window seemed to indicate increase/decrease volume as I pressed the keys, but after a few seconds the volume window greyed out again with the No Entry symbol.
Trying to flip the digital audio switch in the jack occasionally gets the red light to turn off for a couple seconds, but then it comes back on.
Is there any particular problem with this that can't be solved by the aforementioned methods, that many people have used to solve it in a simple manner? Could my problem be more serious? Is there anything I could do if I opened up the Macbook, e.g., somehow to manually turn off the digital audio switch?
Any help greatly appreciated.

Got it fixed with a small flathead screwdriver with a fairly wide blade. Opened iTunes, started playing songs, had red light in headphone jack, as per usual with this problem.
Put screwdriver in jack, with blade more or less vertical, started moving it around inside of jack in clockwise motion, pressing pretty firmly. Took just a couple of "swirls" around the inside of the jack and then audio finally turned on! Was a bit of a hassle, but finally worked.
Many thanks to all for their suggestions.
P.S. re. advice not to use metal object. This was the only way I was finally able to solve the problem (i.e., using the small screwdriver). I didn't see where using a metal object would be a problem, seeing as the headphone plug itself is metal. Anyway, it worked.

Internal speakers not shown in sound output, no audio jack red light

Hellooo!
So basically my internal speakers in my mid-2009 Macbook pro are not working. When i try and change the volume i am getting the greyed out speaker symbol. Strangely, when a pair of headphones are plugged into the audio port and set to 'audio input' the internal speakers show up in system prefs, and the sound start working! When the headphones are removed it reverts back to not working again. I'm not getting the red light in the audio port.
This must be a software problem as they physically work when headphones are plugged in and i can hear the chime on startup.
I have tried repairing disk permissions, resetting the PRAM/NVRAM, re-installing OSX and the whole toothpick in the audio port thing.
I dont really want to have to take it to apple but I dont have any options left. My mac is pretty old, so i dont feel it is worth spending loads of money on it should the motherboard need replacing or anything similarly costly.
Has anyone else had similar problems, or a solution?

One more suggestion.
    Applications > Utilities > Audio MIDI Setup
    Audio Devices window
    Side Bar
    Click the Built-in Output.
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Best.

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?

My audio is grey, but no red light is on

Hi! I have an audio problem.
No Red light, but the sound icon is stuck on grey, wont allow me to move the volume bar, F10 F11 and F12 wont do anything and then they are touched, a "forbiden" icon appears below the big audio icon in the middle of the screen.
In system preferences everything is as usual, if I plug headphones says Headphones, if not, says Internal Speakers. The volume bar there has the Mute clicked but on grey, so I can't touch it.
I reseted the PRAM and VRAM and nothing. When computer starts up, it makes the sound, so the hardware works. Any Ideas?
Here the images:
Hoping someone can give me a hand.
Thanks!

Though, it works on VLC, but quicktime wont play any MP4 or other videos...
I've been around the forums, web, searching on google, and nothing seems ti solve this.

Audio don't work and lighted red light

I am having a problem that is leaving worried me. Mine iMac MC309BZ/A, simply stopped to function the sound. I verified and the red light is lighted in the output of audio. The stranger is that, aproximadamente the 7 hours before, I assisted a film and functioned normally, without problems some. The sound icon is grey. Another strange thing is that when I bind, it touches the opening sound. What it makes me to think that the problem is not in the hardware. Already I made reset in the NVRAM and the PRAM.
From now I am thankful.

Hello,
Long shot, but...
Open Audio Midi Setup in Applications>Utilities, see the input & output options & KHz setting there, some things will change it for their own use, then not set it back

Audio jack showing red light indicator

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.

Getting red light on the audio port

Hi, im not able to get sound on my macbook, ive tried using a headphone, and it works fine, but as soon as i plug out the audio jack, i see a red light on the audio port, and the sound icon is grayed out...
I've read similar problems on the forum, but could not get a resolution, can someone help me out with the correct resolution of this problem????

the toggle switch inside the audio jack it flipped the wrong way, so your mac still thinks your headphones are still plugged in. Try to rapidly insert and remove the headphone jack in and out of the port to toggle the switch back.

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Red Light, No Audio, Realtek

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