I've been having this problem for quite some time now, except recently it's been occuring quite frequently. You see sometimes I'll have this problem where the receiver keeps turning off either instantly or after 5-20 seconds after powering it on. It will keep doing this until it decides to start working again (maybe an hour or 2 or 3). At first I thought it might be the power conditioner it was connected to (panamax 1000+) but I tried plugging it into a separate surge suppressor and also straight into the wall outlet w/ the same results. I thought maybe it was drawing more current than was available so I turned off nearly everything in the room and house... the problem persisted. I quadruple checked all the connections to each speaker and to the receiver and even rewired the entire setup to make sure there aren't any bad connections... yet the problem still remains! I know it isn't a matter of speaker impedence either, b/c I disconnected my 4ohm rears to make sure that wasn't the problem. So now I'm lead to believe the receiver is defective. Any ideas that I could try before I'm forced to send it in for repair?