Why is there no sound coming from my speakers?

Double check to make sure that all the cables are connected correctly. The sender should be connected to the speaker input wires and the receiver should be connected to the speaker output wires. If these are properly connected and there is still no sound, double check that your device has been properly connected (see section "No Communication Between Sender and Receiver" in the troubleshooting page). After ensuring proper wire connection and proper device connection, if there is still no sound, there may be a problem with the speaker wire input on the sender. Consider replacing this part.