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RED LIGHT IN HEADPHONE JACK? What does that mean?

3109 Views 4 Replies Latest reply: Jul 6, 2012 10:42 AM by Canam Carlo RSS
Canam Carlo Level 1 Level 1 (0 points)
Currently Being Moderated
Dec 17, 2011 5:05 AM

I observed a red light actually flashing in the headphone jack of my MacBook. The speakers do not function now, although they functioned until recently. The headphone jack functions, but there was a red light in there. Does anyone know what it means?

MacBook 2.2 GHz Intel Core 2 Duo, Mac OS X (10.6.7), 4Gb RAM, 500GB HDD
  • DaManni Level 1 Level 1 (0 points)

    The Airport Express uses this kind of jack also for the possibility to plug an adapter in and transmit the audio signal digitally via a fiber optical cable. This system is called TOSLINK.

    Some MacBooks that are not too old have this technology. The great thing is, that you have one jack for two possibilities of connection one digital and one analoge.

    So as far as I understand it, your MacBook doen't want to report any fault by showing a red light in the jack, it only has technological possibilities you didn't know.


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