Please help. Just the other day, I turned the receiver on and no sound on any speaker from any channel. (This receiver had been working fine for almost two years.) I unplugged it for half-a-day and tried it again with no luck. I reset the microprocessor, again with no luck. I just have 2 front speakers hooked up now with the FM antenna. Everything looks in order on the front panel, no warnings, etc. Just no sound. Nothing whatsoever. Has anyone had a problem like this? Is there some setting I mistakingly have put it on? Thanks for any help!