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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.
Macbook Pro Red Light/No audio Problem solved. | Mac-Forums
https://www.mac-forums.com/threads/macbook-pro-red-light-no-audio-problem-solved.36726/
After doing so, the headphone jack will not work as an audio output for either analog or optical, but the internal speakers will work fine. This is b/c the switch is basically bypassed, the macbook will never know whether there …
SOLVED: Audio jack problem, no speaker sound, red light ...
https://www.ifixit.com/Answers/View/8797/Audio+jack+problem,+no+speaker+sound,+red+light
MacBook Pro 13 Audio FIX, Red Audio Light FIX 100% …
https://www.youtube.com/watch?v=XGi4CeNdr1U
Macbook "Red Light" audio fix - YouTube
https://www.youtube.com/watch?v=whzcJYavU4c
MacBook Pro Audio Stuck on Digital Out - iFixit Repair Guide
https://www.ifixit.com/Guide/MacBook+Pro+Audio+Stuck+on+Digital+Out/129645
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 …
No Audio on MacBook Pro | MacRumors Forums
https://forums.macrumors.com/threads/no-audio-on-macbook-pro.2328544/
753. 52. Denver. 29 minutes ago. #1. Hi guys, I am "refurbishing" a 2012 MacBook Pro 13" (non-retina) as a gift for a friend and have installed 2 SSD's (one for macOS, one for Windows 10) and 16GB RAM. I'm running into an issue with the audio that I can't seem to find the fix for by searching. When booting, the chime is loud and clear.
MacBook Has No Sound? Get Not Working Sound Back Easily
https://recoverit.wondershare.com/mac-tips/macbook-no-sound.html
To fix the MacBook audio not working issue, you can consider restarting its Sound Controller. Step 1. Just go to your Mac's Finder, browse to Applications > Utilities and open the Activity Monitor. Step 2. Once the Activity Monitor window is launched, search for the "CoreAudio" process. Step 3.
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