Try these solutions:
1. Make sure the unit is not in Standby mode
2. Check that the source component is properly connected
3. Check that your speakers are properly connected
4. Check your source devices’ volume control to ensure this is not muted
5. Check with the alternative source device
6. Use different interconnect cables and speaker cables.
7. Ensure that the correct input has been selected via the Balanced/Unbalanced switch