My 32PFT6500/12 has begun to show a disturbing problem, to wit: at completely random intervalls the audio will cut out for a second or so, both on speakers and headphones. This is a new problem, only occuring in the last week or so. No new configuration, same as before: TIVO and Samsung SMT-C7160 boxes, both connected via HDMI cables, no external sound system, just headphones. Software upgrade a few weeks ago. Is there some audio setting that I can change/impliment to alleviate this very annoying problem?