1, open the control panel, sound and audio devices, look at the volume of this item, and then look at the second device volume of this item, whether it is gray, if it is gray, according to step 2 to check, if it is not gray, according to step 3 to check
2, from the desktop of the "my computer "(right-click) in the "Management" to open the "Device Management" column, see "sound, video and game control" in this column whether there is a question mark in the If there is a question mark in the "Sound, Video, and Game Control" column, the sound card driver is not installed, so find the sound card driver and install the driver.
3, if the sound card driver is installed or no sound, try to use the following method to check: Run "Dxdaig", open the DirectX Diagnostic Tool, open the "Music" column, see if the default port is disabled. If so, click Enable to open the music port.
Check if your sound card is damaged, and check if the sound card driver is installed or not installed correctly. Right click on my computer - Properties - Hardware - Device Manager - Sound, Video and Game Controllers - click on the plus sign - check for the name of your sound card (the first one is). If not, the sound card is not installed or damaged, if so, uninstall the driver and reinstall.