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SOLVED: Audio jack problem, no speaker sound, red light ...
https://www.ifixit.com/Answers/View/8797/Audio+jack+problem,+no+speaker+sound,+red+light#:~:text=The%20red%20light%20in%20the%20headphone%20jack%20means,the%20port%20operates%20in%20optical%20or%20analog%20mode.
Red light in headphone jack and no sound - Apple
https://discussions.apple.com/thread/3694502
Your analog/digital switch in the port is stuck -- the red light is the dgital audio signal. Try the headphone plug again, this time wiggling it from side to side while it's plugged in. Repeat as needed. If no luck, take the machine in for repair under your warranty.
SOLVED: Audio jack problem, no speaker sound, red light ...
https://www.ifixit.com/Answers/View/8797/Audio+jack+problem,+no+speaker+sound,+red+light
The red light in the headphone jack means that the MacBook Pro thinks that an optical audio cable is plugged into the port. Try unplugging and replugging a headphone plug into the port several times. There is a tiny sensor inside the port that determines whether the port operates in optical or analog mode.
sound - Red light from headphone jack Macbook Pro …
https://askubuntu.com/questions/643757/red-light-from-headphone-jack-macbook-pro-running-ubuntu-14-04
These are the steps to solve red light audio jack issue in Macbook. open system settings. go to output tab, select speakers - Built-in Audio option under Play sound through category. look for the mode option under settings for speakers category. Change mode from Analog Stereo Output to Analog Surround 2.1 Output or Analog Surround 4.1 Output.
MacBook Pro 13 Audio FIX, Red Audio Light FIX ... - …
https://www.youtube.com/watch?v=XGi4CeNdr1U
Fix Audio jack problem, no speaker sound, red light - MacBook Pro 13Best and simple method to fix mac book pro sound issue and save your money.1. Plug 3.5mm ...
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