The power button powers both the units. The menu works fine. But whether you connect the inputs digitally to the pdsd or analog to the pav, there is no sound. The only thing I hear is static and few thuds. The amber light on the pdsd glows meaning that its decoding the digital signal fine. Initially I thought that its a connection problem but after checking everything ten times and also hooking same wires to my older reciever I am sure that connections are fine. The other culprit could be the communication cable I got from the local audio store.