Have just unpacked my onkyo 875 and gone through all the setup instructions. Thge box turns on but i just can't get any sound out of it at all! I've checked a rechecked all the connections. When i plug the microphone in and run the setup procedure, no sound comes out of the speakers at all and it just comes up with 'speaker detect error', double checked the speakers with another amp and work fine. If anyone can shed any light on the problem i would be most greatful.