Help! aiwa receiver no sound

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My receiver is not making any sound. Everything seems to be working, the cables seem to be connected properly, and the power is on. The pictures also shows up on the TV, but we cannot hear any of the sounds from the speakers that connects from the receiver. We can hear sounds from the TV only. What may have happened to the receiver? Any suggestions for repairing? :(
 
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This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.