Wondering if anyone can help. I have a Yamaha RX-V2300 Receiver that is now about a year or so old. Recently I had a 5 channel surround sound system that required a slight upgrade when one of my front speakers broke. I replaced my two front speakers and my center channel. Problem has arisen for the first time since I have had this receiver that the receiver will automatically shut down while listening to movies at a higher volumne. Have checked the impedance. It is set correctly. Wires are all secure and correct with no cross wires. Have tried every suggestion in the troubleshooting guide and nothing seems to be working. Any help would be greatly appreciated.