Hello everyone. I have a following problem:\r\nI'm trying to troubleshoot a system with 2x M&S xdm46cc + an expansion base. The problem is that nothing works. Power gets sent to the keypads,they power up and respond to the button presses and remote control, but the red volume lights keep blinking and there is obviously no sound going into the speakers.It happens to all 9 zones throughout the house. I have disconnected the whole system to downsize the trouble possibilities, even removed a keypad from the wall and connected it with a jumper to the main unit. No fix, talked to tech support, not much help there, but they suggested a problem with amps\/controllers. The only thing that makes me question this, is the fact that both amps behave identically. I have tried resetting the units, checked all possibilities I could think of. I want to make sure that this is a problem with the amp and not something else, before I have the customer whip out over $200 to ship them out to be fixed. Anyone with an advanced knowledge of M&S XDM46CC or XDM4600 please help.