My ARCAM receiver will not accept any digital audio signals. When I try to connect my DVD player from the optical or coaxial method, there is no sound. When I try to connect my cable box from the optical or coaxial method, there is also no sound. Also, when I try to connect the digital input from the cable box the modes on the receiver start freaking out changing randomly. The receiver then starts switching between i½digitali½ and i½pcmi½. And the modes go from PLII Music, Dolby 2vch, Dolby S Mix, automatically.I even changed the cable box because I thought there was something wrong with it. The only way I can get any sound is anolog and even that sound is kinda distorted. Does anyone know what may be the problem here? Any help is appreciated! Jon