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Re: Old MBP's headphone jack port don't always work with connected speakers.

Cross-posted to 2 groups.

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Ant <ANTant@zimage.com> wrote:
> In comp.sys.mac.portables Jolly Roger <jollyroger@pobox.com> wrote:
>> On 2017-02-08, Ant <ANTant@zimage.com> wrote:
>>> In comp.sys.mac.portables David Empson <dempson@actrix.gen.nz> wrote:
>>> 
>>>> A possible explanation is a faulty socket which is mistakenly activating
>>>> digital optical audio output rather than analog audio output. If it only
>>>> happens for some speakers, it might only be happening while the plug
>>>> from those particular speakers is connected - perhaps it is a slightly
>>>> different shaped plug which is falsely triggering the digital optical
>>>> output mode, or there could be a physical obstruction in the socket
>>>> which is preventing the plug from going all the way in, resulting in the
>>>> same effect.
>>> 
>>> I forgot to mention that these are analog speakers only.
>>> 
>>>> If the output was stuck in digital mode you would see a red light in the
>>>> socket when looking into it, but if it only happens while a plug is
>>>> inserted, it may be hard to spot.
>>> 
>>> Hmm, we never saw this red light before but then we don't have any 
>>> digital speakers.
> 
>> The output can still get stuck in digital mode; so you should look for
>> the red light to make sure it's not turned on.
> 
> OK. We will look for that. I never saw anything red. Does it show like a 
> red circle in that audio out hole with the audio cable connected?

Here are some YouTube videos that show it:

<https://duckduckgo.com/?q=mac+audio+red+light&iax=1&ia=videos>

-- 
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JR

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Thread

Old MBP's headphone jack port don't always work with connected speakers. ANTant@zimage.com (Ant) - 2017-02-07 00:41 -0600
  Re: Old MBP's headphone jack port don't always work with connected speakers. Nelson <nelson@nowhere.com> - 2017-02-07 04:31 -0500
  Re: Old MBP's headphone jack port don't always work with connected speakers. dempson@actrix.gen.nz (David Empson) - 2017-02-08 10:33 +1300
    Re: Old MBP's headphone jack port don't always work with connected speakers. ANTant@zimage.com (Ant) - 2017-02-08 02:14 -0600
      Re: Old MBP's headphone jack port don't always work with connected speakers. dempson@actrix.gen.nz (David Empson) - 2017-02-08 21:29 +1300
      Re: Old MBP's headphone jack port don't always work with connected speakers. Jolly Roger <jollyroger@pobox.com> - 2017-02-08 15:14 +0000
        Re: Old MBP's headphone jack port don't always work with connected speakers. ANTant@zimage.com (Ant) - 2017-02-09 03:02 -0600
          Re: Old MBP's headphone jack port don't always work with connected speakers. Jolly Roger <jollyroger@pobox.com> - 2017-02-09 13:11 +0000
            Re: Old MBP's headphone jack port don't always work with connected speakers. ANTant@zimage.com (Ant) - 2017-02-09 19:18 -0600
              Re: Old MBP's headphone jack port don't always work with connected speakers. Jolly Roger <jollyroger@pobox.com> - 2017-02-10 02:10 +0000
              Re: Old MBP's headphone jack port don't always work with connected speakers. Lewis <g.kreme@gmail.com.dontsendmecopies> - 2017-02-10 23:51 +0000
          Re: Old MBP's headphone jack port don't always work with connected speakers. Steve Carroll <frelwizzen@gmail.com> - 2017-02-10 18:21 -0800

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