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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 Community
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. View answer in context ★ Helpful wjosten Level 10 (95,297 points)
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.
MacBook Pro 13 Audio FIX, Red Audio Light FIX 100% …
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 ...
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. Enjoy!
MacBook speakers off, red light coming from the headphone jack
https://apple.stackexchange.com/questions/261282/macbook-speakers-off-red-light-coming-from-the-headphone-jack
The red light is probably because its a Mini-TOSLINK port. There is a metal prong in the jack and sometimes it can be bent , causing the digital audio to be turned on when it shouldn't be. The problem is there is a switch in the jack that tells it if you have a mini headphone plug or an optical plug plugged into the headphone port .
SOLVED: My headphone jack glows with a red light - …
https://www.ifixit.com/Answers/View/59477/My+headphone+jack+glows+with+a+red+light
The red light was on, but I was still able to switch between sound types, but the headphone sound was really scratchy. In the end I just bought a USB audio interface for $10, which as a workaround, works just fine.
Red light in audio jack, no sound! Help! | MacRumors Forums
https://forums.macrumors.com/threads/red-light-in-audio-jack-no-sound-help.573822/
It sounds like it is jammed in optical audio out mode. There's a microswitch that turns the port on and off. Looking into the port, the switch is …
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