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Repairing the mysteriously muted Mac

#1 User is offline   Macworld 

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Posted 20 March 2013 - 05:00 AM

Post your comments for Repairing the mysteriously muted Mac here
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#2 User is offline   mariorelvas 

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  Posted 20 March 2013 - 12:08 PM

Hi guys, I belive this is the same old (2006?) problem. Check these images

http://www.google.co...iw=1267&bih=618

Best regards,
Mário
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#3 User is offline   mariorelvas 

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  Posted 20 March 2013 - 12:12 PM

some images

http://farm6.static...._8a04aa9169.jpg

http://www.redstarit...led-macbook.jpg

Mário
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#4 User is offline   Strawtag 

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  Posted 20 March 2013 - 12:13 PM

Yep, unless somebody started up with the shift key down after reading other helpful hints, then forgot.
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#5 User is offline   Subrunner7Mac 

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  Posted 22 March 2013 - 03:52 AM

I've got a 2 month old iMac 27". Suddenly the left audio channel does not play out of my head set (standard ear pods that come with iPhone 4s). I tried another headset (older iPod set) and a creative lab external speaker set plugged into the headphone jack. Left channel fails to play.
Both channels play out of the internal speakers normally when the headphone jack has nothing plugged into it.
Any thoughts?
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#6 User is offline   lasergm 

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  Posted 22 March 2013 - 04:02 AM

My MB Pro sound output quit several times when the outside temp was 41 C, indoor temp perhaps higher and I was busy on video Skype. I presumed it was the heat that stopped the sound card as it worked again after turning off the computer and letting it cool. But perhaps it was resetting the output.
Has anyone else had a heat related sound problem?
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#7 User is offline   richsadams 

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  Posted 22 March 2013 - 08:00 AM

I've experienced this issue on my '08 iMac since it was new...many others have as well...on old and new iMacs, MacBooks, etc. There are several threads on about it on Apple's forum - here's one:

https://discussions....tart=0&tstart=0

FIX: Similar to the suggestion in the article, unplugging the speaker cable from the Mac's headphone jack and plugging it back has always worked but it only takes 1x for it to work (for me).

One of the "fun" outcomes is that when I disconnect the cable from the jack there's a flood of "backed up" sound effects that play all at once!
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#8 User is offline   richsadams 

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  Posted 22 March 2013 - 08:03 AM

Quote

I've got a 2 month old iMac 27". Suddenly the left audio channel does not play out of my head set (standard ear pods that come with iPhone 4s). I tried another headset (older iPod set) and a creative lab external speaker set plugged into the headphone jack. Left channel fails to play. Both channels play out of the internal speakers normally when the headphone jack has nothing plugged into it. Any thoughts?


Try resetting the PRAM and NVRAM:

http://support.apple.com/kb/ht1379

Failing that, take it to an Apple Genius Bar or Apple authorized repair facility nearby. The one-year warranty (or three-year warranty if you bought Apple Care) is still in effect, it's a no-cost repair. If nothing is nearby, call Apple Support:

http://support.apple.com/kb/HE57
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#9 User is offline   richsadams 

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  Posted 22 March 2013 - 08:55 AM

Quote

I've got a 2 month old iMac 27". Suddenly the left audio channel does not play out of my head set (standard ear pods that come with iPhone 4s). I tried another headset (older iPod set) and a creative lab external speaker set plugged into the headphone jack. Left channel fails to play. Both channels play out of the internal speakers normally when the headphone jack has nothing plugged into it. Any thoughts? Try resetting the PRAM and NVRAM: http://support.apple.com/kb/ht1379 Failing that, take it to an Apple Genius Bar or Apple authorized repair facility nearby. The one-year warranty (or three-year warranty if you bought Apple Care) is still in effect, it's a no-cost repair. If nothing is nearby, call Apple Support: http://support.apple.com/kb/HE57


Apologies, meant to say PRAM/NVRAM and SMC!

http://support.apple.com/kb/ht3964

http://support.apple.com/kb/ht1379
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#10 User is offline   Subrunner7Mac 

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  Posted 22 March 2013 - 12:08 PM

I appreciate your comments. The fix was embarrassingly simple. The balance was set to the far right in the sound system setting for headphones. I had checked this earlier but at the time the headphones were not plugged in and I was seeing center balance for internal speakers. I'm not at all aware of how the balance was set so far off on headset since I did not make any adjustments to it to my recollection.
I got great help, although embarrassing from Apple Care.
Thanks to all who took the time to recommend solutions.
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#11 User is offline   Jensmih1234 

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  Posted 16 February 2014 - 08:04 AM

Subrunner7Mac said:

I've got a 2 month old iMac 27". Suddenly the left audio channel does not play out of my head set (standard ear pods that come with iPhone 4s). I tried another headset (older iPod set) and a creative lab external speaker set plugged into the headphone jack. Left channel fails to play. Both channels play out of the internal speakers normally when the headphone jack has nothing plugged into it. Any thoughts?


Try going on system preferences and go to >sound after that go to the output tab and in the middle it should have a bar that says left and right make sure its balanced and not completely to the right
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#12 User is offline   sandbag1 

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Posted 16 February 2014 - 09:51 AM

View PostJensmih1234, on 16 February 2014 - 08:04 AM, said:

Subrunner7Mac said:

I've got a 2 month old iMac 27". Suddenly the left audio channel does not play out of my head set (standard ear pods that come with iPhone 4s). I tried another headset (older iPod set) and a creative lab external speaker set plugged into the headphone jack. Left channel fails to play. Both channels play out of the internal speakers normally when the headphone jack has nothing plugged into it. Any thoughts?


Try going on system preferences and go to >sound after that go to the output tab and in the middle it should have a bar that says left and right make sure its balanced and not completely to the right


Read Subrunner7Mac's reply just above your post. ;)
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