How does the Windows 7 computer test the sound card for sound?

There are some games in the computer that have no background music. Is the sound card of the computer broken? How to test it?

Test the sound

1, right click on the horn button in the lower right corner, click & ldquo;play device”

2, click “speaker”, Click Configure

3, click “Stereo”, click on the test, if there is a voice indicating that the computer is all right

What if there is no sound?

1, click on "Speakers", then click on Properties

2, click on the level, if they are forbidden, click on them.

3, click on the enhancement, remove the &tag (√)

Note: If the above method is invalid, please find a professional computer master.