Model A1225 / Mid 2007 and Early 2008 / 2.4, 2.8, or 3.06 GHz Core 2 Duo processor

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Headphone/External Speaker Jack stopped working

I had powered Altec Lansing speakers hooked up to my 24" iMac and they worked fine for ~1 year. I recently upgraded my RAM with no difficulty, however afterwards, the headphone jack no longer recognized the presence of the external speakers. The sound preferences panel "output" tab shows "Internal Speakers" and "Built-in Output" regardless of whether the external speakers are plugged in or not. Rarely and for a moment, if I plug and unplug the speakers from the headphone jack, the sound panel occasionally shows "Digital Out" but still no sound and it quickly reverts back to "Internal Speakers." Any thoughts?

Answer this question I have this problem too

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Black Friday
Broken doesn't stand a chance.

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Well, this isn't a fix per se to the problem of the malfunctioning headphone jack, but it is a workaround which allows you to continue using your external speakers for all Mac sound output.

This fix requires obtaining a piece of hardware, namely an Airport Express with sound output. According to Apple, this device can only stream sound out from iTunes. However, with two pieces of open source software, this situation can be changed to allow all Mac sounds to be routed through the Airport Express. The two pieces of software are soundflower and the other is RaopX. Description of how to get and intstall each is available at http://www.hersson.net/projects/raopx, and as best as I can tell, they work well.

You're still left with a malfunctioning headport jack, but you have full access to the highest quality sound that you wish to expend your $$ on relative to the speakers you buy.

So, work around, but not true fix

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The url link to www.hersson.net is broken.

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This thread is a year old, but since it still comes up in a search I'll give my February 2012 advice:

Computer: iMac 27" Intel based all in one

Issue: Internal speakers work; headphone jack does not.

Seems to me, it is easy to bend the inside connectors, fry the jack itself or otherwise simply break it. You can click all the settings, preferences, and MIDI controls you want - it will not correct the problem. You're a Mac user, you know you have tried all the settings and are second guessing your own expertise. So here's the problem: your headphone audio jack is cooked. Get over it.

Solution #1 (expensive): take it to an Apple store.

Solution #2 (inexpensive): get a USB to stereo audio input off Ebay for $2.00, wait 3 weeks for it arrive from Hong Kong and use your headphones through it.

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audio output is damaged , jack is not fitting any more : if I go for solution #2 please advise what to buy : male USB to female minijack ? (not available?) how to use on my imac ? how readdress audio to USB output instead of audio output ?

thnks in advance

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Me the same; Headphone jack and inline jack both u/s on my iMac 27" best part is they both very rarely used just goes to show what lack of attention to detail on this prestigious piece of kit!!! cheap $@$*!! - I'd sack the @%^$$@$# who designed this, why didn't they put these vulnerable parts on a removable section?? hang on!! no! make it more difficult? we make more money!! yeah its called Greed! what comes around -- goes around!!

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Guess what you will notice on the internal input that earphones are not listed. So to activate the earphones on a MacPro the device (earphones) must be connected before it to show up in the internal input - go figure!

Thats how I got my earphones to finally work on my MacPro.

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This solved a problem I've had a long time. Thanks!!!

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Worked for me too! Thanks!

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Have you tried a pair of headphones or a different set of speakers in the headphone jack? If headphones work in the jack and you get the "Headphones" listing in the Sound panel, then the problem may be with your speakers or the speaker plug rather than the computer.

Another possibility -- could "Built-In Output" you're seeing be referring to the headphone jack? I think your computer has only one audio out, so it might not have separate listings for "Headphones" and "Line Out." If that's the case, maybe click on that listing to see what the setting of the output volume is. Maybe it's muted?

If the problem ends up being the headphone jack on the computer itself and you're leery of attempting a repair, an alternative might be to get a USB to Mini adapter like the iMic. But I'd highly recommend confirming that your speakers work with another machine first.

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I have tried plugging a variety of things into the headphone jack -- several sets of headphones and several types of speakers -- all with no effect. And all of them are confirmed to work on other systems (i.e. iPod out).

It is definitely not muted. I get fine sound coming out of the internal speakers (even when something is plugged into the headphone/speaker jack in the back)

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Having the same problem - the only output choice that appears is "Internal Speakers" - though hitting the ? button in the sound preferences box gets me this :

"Select a device for sound output

To listen through your computer’s built-in speakers, select Internal Speaker.

To listen through your display’s built-in speakers, select Display Audio.

To listen through speakers or headphones that are connected to the headphone jack, select Headphones.

To listen through external USB speakers, select your speakers from the list.

To listen through another audio interface, select it from the list."

BUT there is no other choice listed except "internal speakers"

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I have definietly the same problem like Ken, everything seems to be ok, even the output jack doesn't seem to be damaged. It's probably a software problem. Does anybody have an idea how to fix this?

Andre

<I have tried plugging a variety of things into the headphone jack -- several sets of headphones and several types of speakers -- all with no effect. And all of them are confirmed to work on other systems (i.e. iPod out). It is definitely not muted. I get fine sound coming out of the internal speakers (even when something is plugged into the headphone/speaker jack in the back)

Ken, Jan 8 2010 @ 8:38 PM>

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Thank you George - LOL I cant believe I didnt work that one out - Yes after an hour of trying to troubleshoot this issue, as soon as I plugged the Speakers back in the headphones option appeared in the Sound Settings and it was in fact muted.

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Ken will be eternally grateful.
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