Mine does. When the TV sound is on it's not usually loud enough to bother me, though if I listen for it I can hear it. The volume seems to vary. It gets much louder if I switch to Active/Natural/100Hz modes, but I use progressive all the time. If you have one of these sets, is it completely silent when the sound is muted? If not, how loud is it? (How far away can you hear the buzz/hum.) I've had mine a week and can't make up my mind whether I want to get it replaced or repaired or whether I should live with it and hope it improves by itself.