I am using Windows 10, and my sound from my audio jacks has stopped working for headphones and external speakers. My USB headphones work fine and can record sound, but they jacks allow nothing. The computer recognizes my speakers in the audio devices, and they hum when I turn them up, but again, the sound is not working.
I would ask you to check & advise how does the system respond in the following situation,
*Restart the system in safe mode with networking and confirm if the same issue seen with headphones & speakers.
*check if you have Conexant SMART AUDIO listed in the device manager under audio devices if it is then uninstalling the Conexant SMART AUDIO software fixes the audio issue, restart the system once this is done.
Also do send the service tag of the system via private message so that I can check system specifications before assisting you further.