Hello all. I have a set of old Logitech Z680 5.1 PC speakers with a minor problem. I have tried this with two different computers and sound cards: Audigy 2 and X-FI Extreme Gamer. When I use Creative's diagnostics I only get sound through 2 speakers. But when I play a movie, game, or TV the sound plays normally. It never used to do this. I am a little worried this is a sign of impending failure of the speakers. What do ya'll think?