All, I own a Sony receiver that I purchased in 2000 as part of the Sony HT-DWW620 "Home Theater In a Box" package. It was, I believe, the first Sony HT in a Box receiver that featured both Dolby 5.1 and DTS decoding. Until recently, it has performed like a champ. Lately, though, it has begun to utter a series of pops and clicks that result in the near-complete loss of the front center channel. When I say "near-complete," I mean that I can still hear a very, very muffled noise coming out of the center channel. 1. I have checked the wire path and connections at both receiver and speaker ends. 2. I have noticed that if I tap hard on the back of the receiver, I cause a another series of pops/clicks that temporarily spark the front center channel back into action. The resumed functionality lasts anywhere from a few minutes to a few hours before another series of pops and clicks renders it muffled and nearly mute again. 3. This happens when I am using audio from a number of sources, including DVD, AUX, TV. Any thoughts on the cause and fix? Should I just buy a new receiver? Thanks in advance.