1, first of all, we need to confirm that the hardware device does not have any problems (such as sound card damage, speaker damage, BIOS setup problems, sound card contact, etc.).
2, after the confirmation is not a hardware problem, for system troubleshooting, click on the lower right corner of the taskbar "small horn" icon to see if it is set "mute" or the volume setting is too small.
3, if there is no small horn in the lower right corner, then double-click on the "Control Panel" to open "sound and audio devices."
4, under the "Volume" tab can also adjust the volume size.
5, if the device volume display is gray, can not operate, may be the sound card driver damage, right click Computer, click Properties Command.
6, open the System Properties window, switch to the "Hardware" tab, click the Device Manager button.
7, expand the "Voice, video and game controller" project, here to see if the sound card driver has no yellow "?" or yellow "!" to indicate that the sound card driver is not installed or installed incorrectly,! Indicates that the sound card driver does not match.
8, download the Driver Wizard software, reinstall the sound card driver.