First of all, you should confirm whether your computer sound card is set correctly-if you enter the second step correctly, check whether the microphone is connected to the input jack-if you enter the third step correctly, check whether the microphone head (voice coil) is open or short-circuited. If the short circuit or open circuit is confirmed, replace the voice coil.
In fact, your situation is basically the voice coil, which is often said that there is something wrong with the microphone. Repairing is basically the same as buying a new one. Next time you buy a microphone, pay more attention to see if the impedance of the microphone itself matches the input of the notebook.