No sound from the earphones or external speaker using the headphone jack - ideapad, All-in-ones - Lenovo Support US
My laptop has a combo headphone jack. When I plug a 4-pin headphone/earphone, it works fine, but when I plug in a 3-pin microphone, it doesn't work and no audio comes out.
![Troubleshooting Headphone or Microphone Jack Issues on a Dell Latitude and OptiPlex | Dell Singapore Troubleshooting Headphone or Microphone Jack Issues on a Dell Latitude and OptiPlex | Dell Singapore](https://supportkb.dell.com/img/ka06P000000shyRQAQ/ka06P000000shyRQAQ_en_US_2.jpeg)