Hi - i just bought one of these as the one i ordered for my Hova Bator appears to be coming by pony express. i plugged it in and i hear a slight hum but no movement at all. My hova bator egg turner makes a lot of noise when plugged in, kinda like "choonka, choonka, choonka". But the LG is silent. Is this normal for this model or does it sound like i got a defective one? Thanks!