Four reasons for the lack of sound in the win7 system microphone and solutions

I. Hardware Problems

This situation should be ruled out first. Regardless of whether you are using a speaker or a headset, first check if the device is properly connected to the computer and try to re-plug the audio cable.

Second, the system settings problem

This situation is very complicated, there are many possible reasons, let us look at the general solution steps.

Set the sound related properties

1. First enter the control panel —— sound options, there should be a device like a speaker under the play tab, double click to open the properties window, at the level In the tab, the button to keep the speaker is normal;

2. Similarly, if there is no sound in the microphone, enter the level column in the recording tab and keep the sound icon normal. status.

Third, check if there is a problem with the sound card driver

Right-click on the computer option in the Start menu, select Properties, go to Device Manager and see if there is any sound, video and game controller. Items with yellow or red exclamation marks, if ever, try updating the sound card driver (downloadable driver wizard auto update).

Fourth, check if Win7's voice service is disabled

Right-click on the computer item in the Start menu, select Manage, go to the Service Options, find the Windows Audio item and make sure it stays on. status.