This happened for the first time last night. Sarted system with the My TV button on remote. Cable box powered up, Receiver powered up tv started but no sound. Looked at all devices and found zone 2 led on. I don't know if this is usually on but nothing is connected to zone 2. I turned zone 2 off from the front panel and restarted the same as before, still no sound. I switch over to the tuner which is internal to the reciever but still no sound. Volume level responds to remote or front panel. Got out the manual and checked using the trouble shooting guide, sleep timer(off) and several other setting that I cant remeber now but still nothing. Cable box is connected with HDMI to receiver, TV is connected to reciever with HDMI, Blu ray is connected with HDMI. Tv picture was on. Switched over to Bu ray and tried a dvd but same thing, no sound. The manual described a reset pocedure with the remote. I did that then restarted and the system did start. I also noticed a familiar click right before the sound starts which may be a relay latchig to power up the internal amp. (receiver is the amp no external amplifier). Then I had sound. I thought all was okay. This morning my wife turned the system on again pressing my tv on the remote and the same thing happened as last night. Picture is on reciever display on, dislay shows volume level and sound mode (all chanel stereo) but no sound. I shut every thing down with the all off button on the remote then turned each component on one at a time with the remote. this time after the reciever powered up I heard the familiar click and sound came on. I know this is the same machine as an Onkyo model but I am not sure which one. Has anyone experienced somthing like this? Any suggestions? I did read in the manual about a flashing led that indicates an overload but I had no such flashing.