Strange red LED coming from my headphone jack?

Orange Furball

macrumors 65816
Original poster
May 18, 2012
1,325
5
Scranton, PA, USA
Randomly I found this red LED shining out of my MacBook... its coming straight from the headphone jack. I thought it was a laser but its just an LED I guess... what's causing this?

 
Nov 28, 2010
22,684
27
located
The optical audio out has been enabled.
Remove the 3.5 mm plug you use to connect the speakers to the Mac from the Mac's audio out port, and see, if there is a red light. If so, repeatedly plug and unplug the 3.5 mm connector until the light goes away, as the red light is the indicator of the digital, optical audio out being enabled, and sometimes it just gets stuck.
 

Orange Furball

macrumors 65816
Original poster
May 18, 2012
1,325
5
Scranton, PA, USA
The optical audio out has been enabled.
Remove the 3.5 mm plug you use to connect the speakers to the Mac from the Mac's audio out port, and see, if there is a red light. If so, repeatedly plug and unplug the 3.5 mm connector until the light goes away, as the red light is the indicator of the digital, optical audio out being enabled, and sometimes it just gets stuck.
Ahh ok. Maybe it was caused by windows installing or something. Thanks!
 

AppleFanatic10

macrumors 68030
Nov 2, 2010
2,565
135
Hawthorne, CA
That could also be the case. There's an update to the audio called cirrus or something. Look up bootcamp windows 7 red light on audio jack and it'll come up somewhere :)