Onkyo AV receiver sound problem

[erk]

Hi, I have an Onkyo HTS780 receiver and I am having a problem with my coaxial sound, I'm not getting any. I have the audio out from my tv hooked up to the coaxial port on the reciever and has been working fine for over a year but since last weekend I haven't been able to get any sound from it. If I switch the digital input to an optical connection like a Playstation, the sound is fine, but I get nothing when switching it to coaxial. I bought a new cable thinking somehow it could be a cable but I still have the same problem. I was wondering if maybe a fuse could blown or something? I don't know, I'm all out of ideas and hoping someone can help me out. I'd greatly appreciate it!