My computer doesn't enjoy any nouns. What could the problem be? PLEASE backing A.S.A.P!?

I tried to keep watch on videos on the computer but in attendance wasn't any sound. I newly thought that something was wrong beside the videos. But next I tried to listen to my music on realplayer and it didn't work. What could the problem be? I have the volume as loud as it can run!

Answer:
this happened to me this summer. my friend come over, took a look at the back of the computer and told me the with the sole purpose problem was my speakers werent plugged contained by.
plug every thing contained by correctly
check ur speaker connections,ur mute button,n in ur control program look underneath ur sounds or speaker icon
Go into your system nouns proprties..

Click Start > "Run..." > type in "sndvol32".
Make sure adjectives the necessary devices are unmuted (these are output volumes).

Or if you're looking for the input devices, click Options > Properties > check "Recording" and hit OK.
Make sure the adjectives the needed devices are unmuted (these are input volumes).

Dys.

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