Mic fix on HP280G3MT desktop
Internet should be connected for the following steps:-
open terminal and use the following commands:-
sudo apt-get update
sudo apt-get install alsa-tools-gui
hdajackretask
Select a Codec = Conexant CXXX
Under PIN Configuration SECOND-2nd section
Check Overide and in place of microphone select >> Inbuilt MIC
Click on Apply Now on right bottom - enter root password
Then, click on Install Boot Overide - enter root password
Reboot the computer and the microphone should work