I have just had my Tivo box renewed due to hard drive corruption. The new Cisco one makes a throbbing noise when on louder than background noise. Engineer called today and said pretty much that is the way they are and try putting is on something to dampen the noise. Tried that and even picked it up noise still loud and noticeable over background noise in our living room. I understand this is the hard drive but it sounds like a very old computer and puts you off watching TV or recordings as the noise is obvious and ever present. Is this how Tivo boxes are meant to be now - if so I will look to alternative TV service provider! Really disappointed as we never had this issues with the old box!