It seems the CD Audio is not turned up properly. Verify it by following the steps given below: 1.
First check the volume. *
A sound icon should be on the bottom at right hand side of the screen. *
Double-click it to go to the sound properties. *
Make sure the CD-ROM or the CD Audio option is turned up. It should not be muted.
2. If the volume is properly set, now check the Multimedia properties
Go to the Control Panel and double-click on the Multimedia icon. *
Now click on the CD Music tab. *
Verify the CD Music Volume and make sure the volume is turned up.
If still you are having the same problem, you can also check whether the audio cable is properly connected or not.
Hope this would be helpful.