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Model A1312 / Mid 2011 / 2.7 & 3.1 GHz Core i5 or 3.4 GHz Core i7 Processor, ID iMac12,2

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One channel of output jack is not working.

Speakers are working fine. When i plug in a 4 pole mini-jack (like iPhone headphone or similar, the left channel either is completely gone or intermittent. When i plug in a standard stereo mini-jack (regardless wether headphones or jack to RCA cable) left side is missing completely or i get thge same signal as on the right channel aka it's mono). Has anyone experienced similar problems? I guess it's the jack connector but I'd like to be sure before i open or return the iMac as it's just 3 months old. Is it something that can be easily done (maybe loose solder joint etc...) If anyone has pictures of an open iMac same series with detail shot of the outputjack i'd be greatful. Any clues actually are welcome.

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exactly the same problem here, did you get round it?

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If you want a work around purchase an external USB audio adaptor. USB audio is separate from analogue audio.

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I had to bring it to an Apple Service Center. They replaced the logic board under warranty...

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Great job, all you have left to do is to accept your own answer. Then everybody that looks for an answer to their problem, will know what works :-)

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@oldturkey: thx for the info. I am still getting aquainted with the structure of posting here. A bit confusing...

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You should not be making DIY repairs on a 3mo. old machine of any type or make (unless you knowingly damaged it). Contact Apple. Audio jacks are not easily repaired, computer solder is of a special type and requires special tools and skills so as not to destroy the logic boards.

If this answer was helpful please remember to return an mark it Accepted.

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In what way is computer solder different?

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Traditional acid core solder is capable of corroding board traces, generally its too thick or large In working with computer electronics, choose rosin core solder with a thickness of 0.75 mm., A normal, low-cost soldering iron is far too hot for delicate electronic work, additionally you need a soldering tip on your iron no larger than the connection you're soldering (many common irons are far too large). I'm assuming you've soldered a lot before? If not then it's going to be difficult, even for someone that's done a lot of soldering before its easy to overheat adjacent components, burn the board or bridge traces.

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