I've had something strange happen with my 3 year old Marantz SR7200. The center chanel appears to be dead! Sometimes when I switch between surround modes I will get about 0.5s of sound in the center chanel and then nothing. Several months ago the center chanel sounded "staticy" but I put this down to the source. The speaker and speaker wire are good - I connected those to another output and got sound with no problems I checked the amp set up and the center chanel is there and listed as "large" I called Marantz and they suggested trying another speaker on the center chanel. Seems pointless. They also suggested a full system reset and promised to call me back to tell me how to do that. Any other thoughts? I suspect it is likely a problem internal to the amp. Could I put a multimeter across the center chanel outputs and see if there is any kind of signal? Many thanks!