There are three main ways to connect a combined headset, depending on its type:
Separate 3.5 mm headphone and microphone jacks. Located on a computer nearby. Used on older devices with two plugs. In this case, connect the microphone to the pink connector, and headphones to the green.

The universal 3.5 mm jack, which simultaneously serves to connect a headset with a built-in microphone, is used on modern headsets.
It features a longer plug. The connector contains four contact areas, and the socket is marked as in the picture.
Important! When connected to a headset jack with separate connectors (as in the first case), it can work either in microphone mode or in headphone mode. It depends on which connector you will use.

Headsets with a USB connector. Plug into a regular USB socket. After connecting for the first time, the necessary drivers are often automatically automatically installed if you have the latest version of Realtek HD Audio installed.
If the headset does not work after connecting, update the driver and check if your microphone is turned on. We described these procedures in the following blocks of Questions and Answers.
i removed the file for realtek and now my mic and headset doesnt work can u help me please
Last week I downloaded and updated the Realtek Audio drivers for my laptop as per the prompt I received from Driver Update.
Since then, I have been unable to get any audio on Go-to-Meeting or ZOOM. I would like to know why and what to do about it. If the new drivers are not backwardly compatible with the microphone by laptop uses then I need to return to whatever driver I was using at the time since it worked just fine.
This is very annoying.
Thank you for your prompt attention to this matter.
Well, You should uninstall current installed Realtek HD Audio Drivers and download the old version of Drivers again and install it.
And check whether it solves the problem.
why the sound comes speakers when headphones plugged in?
same problem here
I just bought a new gaming PC, and I have tried multiple times connecting a headset and mic. The headphones and audio display clearly, but the mic does not work at all. There is no audio coming from the mic. Been stuck on this for a while. I even tried using another driver to see if it would work, alas, it did not. I want to know how I can fix this problem.
my sond pc not work
I have a headphone with mic but seems the mic is not working. I tried already to check the microphone settings but still can’t make it work. how can I make it function, only one jack is there so I put it in green color on my desktop. The audio is working well, just the mic. badly needed for my work purposes. please help me configure what to do. Thank you!
You are plugging in the wrong jack: GREEN FOR SPEAKERS, PINK FOR MICROPHONE.