Hunted around for bad caps today. After scouring the entire set (except for the light engine), I only found one questionable cap, the largest one in the set. It's a 450 volt, 470 microfarad capacitor in the power supply, and its top is bulbed out like a pillow! (Plastic top) I'm replacing this ASAP anyway, but I doubt it will solve my sound problem, unless you guys think otherwise.