The steps are as follows:

1. First, check whether the mute setting has been accidentally set;

2. There is a problem with the audio connection cable;

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3. Check if you accidentally uninstalled the sound card driver. If so, reinstall it; open the device manager-sound card name-select update driver-browse your computer to find the driver-from the computer's device Just select it from the driver list;

4. Check to see if the audio device service is disabled. If so, just start it; also on the control panel, find Performance and Maintenance-Administrative Tools-Services-Windows Audio-Set the startup type to Automatic and then restart it and it should be fine;