New
#1
Possible fix when headphone jack has no audio, everything else normal
Possible Solution:
Put Windows to Sleep, then wake it up. Headphone jack audio will be restored.
Problem:
Headphone jack randomly stopped outputting audio.
volume control at 100% and appearing to work normally. Laptop internal speakers worked fine.
Windows detects headphones plugged in, but no sound in headphones.
Uninstall sound card and realtek drivers, reboot did not fix problem.
Tested Linux live CD and headphones worked in Linux.
So hardware was definitely not broken. Only Windows was broken.
(I had this issue recently, so I'm leaving this here for search engine results and anyone who has this problem in the future)