I purchased a Mits WS-55805 and DTC100 in late 1999. I have OTA reception for the HD and cable for nonHD. Recently I had my set serviced and the technician turned on the DTC100 which I had not used for quite awhile. Perhaps it is only coincidence that I have lost sound from the digital channels only, anolog over the DTC100 produces sound. During the Technicians visit one of the digital channels had no sound, he thought this might be due to poor antennal placement. I had not had this problem before. Now I have no sound on any of the digial signals. The DTC100 is also connected to a Denon AVR-3300. Any suggestions? All help will be humbly and most appreciated.