I have been using this receiver for about 9 months and all worked well. A few evenings ago, I muted the sound for a commercial and the sound is now permanently muted. (Did the advertiser do that?)
All other audio works fine, tuner, CD, DVD, and the sound from my cable box plays fine through an input other than SAT/CBL.
Is this the mute gremilin or what should I do? I'm thinking warranty repair, here.