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

There are some games in the computer without 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 “Playback device”

2. Click on "Speakers", then click on Configure

3. Click on "Stereo"; then click on Test, if there is a sound indicating everything on the computer Normal

What if there is no sound?

1. Click on "Speakers" and click on Properties

2. Click on the level, if they are forbidden, point them a bit.

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

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